 engine upgrade
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Joined: Apr 2008
Posts: 10
Complete Newb
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OP
Complete Newb
Joined: Apr 2008
Posts: 10 |
Is there anyway to put an aftermarket engine on a 2007 speedmaster? I'm looking for more power that the 904cc upgrade kit provides. Let me know of any ideas!
Rich
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Re: engine upgrade
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Joined: Sep 2007
Posts: 1,668
Learned Hand
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Learned Hand
Joined: Sep 2007
Posts: 1,668 |
Quote:
Is there anyway to put an aftermarket engine on a 2007 speedmaster? I'm looking for more power that the 904cc upgrade kit provides. Let me know of any ideas!
Rich
Have you tried the 904 kit? Pretty impressive seat of the pants gains! 
Howbeit when He, the Spirit of truth, is come; He will guide you in all truth:
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Re: engine upgrade
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Joined: Apr 2008
Posts: 10
Complete Newb
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OP
Complete Newb
Joined: Apr 2008
Posts: 10 |
no, i haven't. there's that much of a gain, huh? i just figured it would be minimal.
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Re: engine upgrade
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Joined: Jan 2005
Posts: 18,825
"Lighten up, Francis."
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"Lighten up, Francis."
Joined: Jan 2005
Posts: 18,825 |
Jeez, just buy a Rocket III and be done with it.
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Re: engine upgrade
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Joined: Sep 2007
Posts: 1,668
Learned Hand
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Learned Hand
Joined: Sep 2007
Posts: 1,668 |
Quote:
no, i haven't. there's that much of a gain, huh? i just figured it would be minimal.
IMHO huge gains over stock! By far the best bang for the buck. Besides, an aftermarket engine conversion could easily cost more than a new bike...
Howbeit when He, the Spirit of truth, is come; He will guide you in all truth:
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Re: engine upgrade
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Joined: Jan 2005
Posts: 8,639 Likes: 3
Old Hand
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Old Hand
Joined: Jan 2005
Posts: 8,639 Likes: 3 |
Also, the handling will likely not be anything like it was. All having been said, if you are determined, I think one of the Triumph triples would come closest to a decent fit. You'd have to fabricate new lower frame rails (good thing they bolt on) and adapt the upper engine mounts. A triple might be wide enough that you could do away with the engine offset too. Note that the chain is on the other side, so you will have to deal with that.
Let's hope there's intelligent life somewhere in space 'cause it's buggar all down here. -- Monte Python
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Re: engine upgrade
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Joined: Jan 2005
Posts: 18,825
"Lighten up, Francis."
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"Lighten up, Francis."
Joined: Jan 2005
Posts: 18,825 |
Quote:
Is there anyway to put an aftermarket engine on a 2007 speedmaster?
With enough time and money, anything is possible. But is the view worth the climb?
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Re: engine upgrade
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Joined: Feb 2008
Posts: 2,671 Likes: 15
Loquacious
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Loquacious
Joined: Feb 2008
Posts: 2,671 Likes: 15 |
Quote:
With enough time and money, anything is possible. But is the view worth the climb?
Agreed! Or stated differently, "is the juice worth the squeeze..."
Last time I was on the SM I thought, "this thing is about 300cc's shy of perfection". We shall see.
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Re: engine upgrade
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Joined: Jan 2005
Posts: 3,611 Likes: 1
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 3,611 Likes: 1 |
Stewart
.......
"It's outside your field of expertise."
"Poppycock normally is."
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 Re: engine upgrade
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Joined: Jun 2006
Posts: 2,626
Loquacious
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Loquacious
Joined: Jun 2006
Posts: 2,626 |
Anybody remember the Hogslayer? T.C. Christenson built a double-engined Norton drag racer in the '70s. If you really want to, you can have the first double-engined Speedmaster. Just add money. 
Steelheart- '03 Speedmaster Black/Yellow
The Hayabusa Killa
16" Shorties/140 mains/Airbox drilled
Procom CDI
"There is no cure for Celibacy. But we can treat the symptoms."
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Re: engine upgrade
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Joined: Jan 2005
Posts: 8,639 Likes: 3
Old Hand
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Old Hand
Joined: Jan 2005
Posts: 8,639 Likes: 3 |
Racer Brown used to say that the limiting factors in an engine swap are money in the bank and gas in the torch.
Let's hope there's intelligent life somewhere in space 'cause it's buggar all down here. -- Monte Python
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Re: engine upgrade
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Joined: Jan 2005
Posts: 4,518 Likes: 32
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 4,518 Likes: 32 |
Quote:
IMHO huge gains over stock! ...
Huge gains over stock 790 or 865cc??
I think our friend here has the 865cc engine and no one on here has ever applied the BB kit on that engine.
Bedouin.
Blessed are those eyes that have seen more roads than any man! (Homer).
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Re: engine upgrade
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Joined: Jan 2005
Posts: 3,753
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 3,753 |
bonnie guys have and have nothing but good things to report
Frank
(Former)05 BA tbike pipes, ai removed, Freak, mikuni hsr 42's, 904, ported/polished head, 1mm oversized valves
NOW-2010 silver and black tbird
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Re: engine upgrade
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Joined: Aug 2006
Posts: 321
Adjunct
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Adjunct
Joined: Aug 2006
Posts: 321 |
Quote:
Quote:
IMHO huge gains over stock! ...
Huge gains over stock 790 or 865cc??
I think our friend here has the 865cc engine and no one on here has ever applied the BB kit on that engine.
I have done the 865-904 swap, and it made a very noticible gain!
There is no greater thrill than being shot at with no consequence. -Churchill
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Re: engine upgrade
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Joined: Dec 2005
Posts: 604
Adjunct
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Adjunct
Joined: Dec 2005
Posts: 604 |
>I have done the 865-904 swap, and it made a very noticible gain!
Confirmation that compression is a big factor.
Said Molly to James, that's a fine motorbike.
Richard Thompson
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Re: engine upgrade
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Joined: Feb 2007
Posts: 23,217 Likes: 61
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,217 Likes: 61 |
Quote:
>I have done the 865-904 swap, and it made a very noticible gain!
Confirmation that compression is a big factor.
Exactly why I don't think there would be that much of a gain from the 790 to the 865 stock parts.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: engine upgrade
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Joined: Dec 2006
Posts: 2,150
Oil Expert
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Oil Expert
Joined: Dec 2006
Posts: 2,150 |
I have an 865 speedie and will probably only consider an upgrade when the engine is getting tired. It would be interesting though to see some dyno figures between one and the other just to make sure the time and money was worth it 
Staintune Pipes, K&N Pods, 45 pilots, TBS needles and 145 mains.
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Re: engine upgrade
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Joined: Jul 2007
Posts: 300
Adjunct
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Adjunct
Joined: Jul 2007
Posts: 300 |
i've been contempulating doing this also,, no-one i trust to go into my motor around these parts,,,,no bubba, get away!!! everytime i ride the adventurer i wish i had that motor on my BA.
some people are like slinkies, they serve no purpose, but, they bring a smile to your face when you push them down the stairs.
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Re: engine upgrade
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Joined: Mar 2008
Posts: 1,586 Likes: 1
Learned Hand
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Learned Hand
Joined: Mar 2008
Posts: 1,586 Likes: 1 |
I've had the 790,have the 865 and 865 with bb.The bb is cool but I think I'm kind of partial to the 790.
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 Re: engine upgrade
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Joined: Mar 2005
Posts: 57
Member
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Member
Joined: Mar 2005
Posts: 57 |
Quote:
The bb is cool but I think I'm kind of partial to the 790.
Me too for some reason. Although I have +10 HP and even more torque with the BB kit in my '02 360 Bonneville, the 790 had a different feeling.
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Re: engine upgrade
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Joined: May 2007
Posts: 6,432 Likes: 1
Worn Saddle
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Worn Saddle
Joined: May 2007
Posts: 6,432 Likes: 1 |
Quote:
Anybody remember the Hogslayer?
A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)
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Re: engine upgrade
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Joined: Apr 2007
Posts: 467
Adjunct
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Adjunct
Joined: Apr 2007
Posts: 467 |
I know two guys going to the Bonneville Salt Flats this year.They are building a dual engine airstream.They are running two Susuki Hyabusa engines.They talked with Dennis Manne about there plan to try and break his record and he said go for it.You may have seen these guys on Speed they had a stand up scooter they ran.The picture of the Hogslayer made me think of this.I talked to one of the guys on Memorial Day weekend.
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Re: engine upgrade
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Joined: Feb 2007
Posts: 23,217 Likes: 61
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,217 Likes: 61 |
Quote:
Quote:
Anybody remember the Hogslayer?
I remember that bike.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: engine upgrade
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Joined: Mar 2008
Posts: 1,586 Likes: 1
Learned Hand
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Learned Hand
Joined: Mar 2008
Posts: 1,586 Likes: 1 |
Im thinkin I saw somthing along the lines of an 1100 kit fer it.
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engine upgrade
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Joined: Mar 2007
Posts: 807
3/4 Throttle
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3/4 Throttle
Joined: Mar 2007
Posts: 807 |
You can get 1200cc big bore kits pretty much off-the-shelf and if that's not enough, nitrous and/or turbo. Both have been used successfully. See: http://forums.delphiforums.com/acecafe/startThat's where the big boys live. 
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Re: engine upgrade
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Joined: Jan 2005
Posts: 4,518 Likes: 32
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 4,518 Likes: 32 |
Quote:
... It would be interesting though to see some dyno figures between one and the other just to make sure the time and money was worth it
Although I have no interest in doing any form of upgrade to the Speedy as for my current needs I am quite satisfied, as is. Plus I already have a hot-rod in my stable. Also given the distances I do I am fearful of tampering with what is already an ok package.
I would, however, also be curious to see the dyno figures.
Bedouin.
Blessed are those eyes that have seen more roads than any man! (Homer).
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Re: engine upgrade
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Joined: Jan 2005
Posts: 386
Adjunct
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Adjunct
Joined: Jan 2005
Posts: 386 |
Quote:
Although I have no interest in doing any form of upgrade to the Speedy as for my current needs I am quite satisfied, as is.
+1. Just me showing up again to say how satisfied I am with my stock 790 with Epcos and appropriate jets. I can get myself into plenty of trouble with LE just the way it is.
Women and cats will do as they please. Men and dogs should just get used to that fact and relax
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 engine upgrade
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Joined: Mar 2007
Posts: 807
3/4 Throttle
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3/4 Throttle
Joined: Mar 2007
Posts: 807 |
If you check the link in my above post, there's a section specifically for dyno runs/results.
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Re: engine upgrade
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Joined: Jan 2005
Posts: 4,518 Likes: 32
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 4,518 Likes: 32 |
Quote:
If you check the link in my above post, there's a section specifically for dyno runs/results.
The link takes you to the registration form ...
I didn't bother to register yet but thank you for making the effort anyway.
Bedouin.
Blessed are those eyes that have seen more roads than any man! (Homer).
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 engine upgrade
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Joined: Mar 2007
Posts: 807
3/4 Throttle
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3/4 Throttle
Joined: Mar 2007
Posts: 807 |
1200 dyno run...
Can't link to an image but the figures are:
Power: 78hp @ 5300
Torque: 85ft/lbs @ 4400
Not big numbers but the torque curve is fantastic.
By the riders own admission, the bike isn't set up properly. Needs to breathe better to take advantage of the motor: new pipes and valves required and the cam positions played with.
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Re: engine upgrade
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Joined: Jan 2005
Posts: 3,734
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 3,734 |
Bonneville Performance sells a variety of big bore kits, but it does get pricey above the standard 904cc kit. You're looking at around $4,000-5,000 after all is said and done for the 1100cc kit. The sample invoice totals up to $3,562 at the link above, but you'll want bigger carbs, plus there's gaskets and other misc. parts.
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Re: engine upgrade
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Joined: Sep 2008
Posts: 3
Complete Newb
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Complete Newb
Joined: Sep 2008
Posts: 3 |
I fitted the 904cc big bore kit - replaced the air box with pod filters - fitted the 40mm Keihins and now get 70hp & 68Ft/Lbs of torque. Pulls like a schoolboy.
The whole journey including mech work was about Au $6000.
The 1200 kit requires stroking the crank which requires welding & grinding. the special mob that do it wont garantee that the crank wont crack 'A' during welding, or 'B' during use
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Re: engine upgrade
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Joined: Sep 2008
Posts: 20
Complete Newb
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Complete Newb
Joined: Sep 2008
Posts: 20 |
Quote:
.........., I think one of the Triumph triples would come closest to a decent fit. ..........
I have to admit, an America with a 1050 in it would be a hoot. Never could figure out why Triumph didnt go that way instead of the 1600 they are working on.
Yankee Dog
2002 BMW R1150RT
2003 Triumph Speedmaster
2005 Ural Gear Up
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Re: engine upgrade
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Joined: Apr 2007
Posts: 3,063 Likes: 8
Loquacious
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Loquacious
Joined: Apr 2007
Posts: 3,063 Likes: 8 |
Here is another link for the 904 and 988. http://www.triumphperformanceusa.com/?main_page=index&cPath=10 Higher compression ration for the cylinders. Cylinders come bored out for you and Nikasil plated. If you go with the stroker kit, the crank is supplied complete with Carillo rods for a reasonable price. If I ever go this route, I would consider this site. Looks impressive.
12 Rocket Roadster
03 Bonneville America
69 BSA Firebird Scrambler
73 Yamaha TX 750
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Re: engine upgrade
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Joined: Aug 2005
Posts: 2,726
Loquacious
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Loquacious
Joined: Aug 2005
Posts: 2,726 |
You can buy a similar 904 kit with nikasil plated (not sleeved) barrels from D&D Cycles of Pensacola, FL for only $895. (they swap with your barrels). They did my whole installation with multiple dyno runs and tests for a total of $1250.00 included dyno runs, parts, and all labor. I've been very happy with mine. They offer higher compression pistons for the same price (I stayed with the standard Wisco). My goal was maximum torque throughout the 3-6K range. I'm getting 75 Hp and 66 Ft. Lbs. of torque. The best part is that at 5250 rpm (where your torque and Hp cross) they are both at 60. Major difference from stock and worth every penny. D&D Performance
Bob
2005 America, 904cc - sold. 2014 Trophy SE.
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Re: engine upgrade
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Joined: Jan 2006
Posts: 168
Adjunct
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Adjunct
Joined: Jan 2006
Posts: 168 |
'07 SM - Ellipse Mirrors, Progressive 412's, Freak, Bub Exhaust, AI Removed, Summer Screen, Low-Pro Saddle
Happy Trails!
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Re: engine upgrade
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Joined: Jan 2005
Posts: 3,753
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 3,753 |
the 904 makes better power everywhere accept i believe 6k and up
Frank
(Former)05 BA tbike pipes, ai removed, Freak, mikuni hsr 42's, 904, ported/polished head, 1mm oversized valves
NOW-2010 silver and black tbird
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