Bonneville America Forums Forums Technical Forums Performance Mods Fair Cost for Dealer Carb Setup After Pipe Change?

I went to my dealer today and asked how much to re-jet my carbs after I install Bubs Pipes myself just before the 500 mile service. They said it would be $180 on top of the 500 mile service cost plus the cost of the jets. Is this fair or should I bite the bullet and do it myself. Although I can tune the holley carb on my chevelle, I'm not sure about the Triumph setup and don't want to mess up the bike. I've heard horror stories about the bike now running right after messing with the carb settings.

Hi Loosend, Dinqua's site is a major help. Pat's Site

Your dealer should be charging about two hours labor. In two hours you can not only pull the carbs, rejet then re-install, but you can clean up stuff while you have access. The procedure is quite simple. And you don't have to worry so much about messing anything up. You will have your bike apart though! I'll post more on this when I am at a dsl connection! Do it. You will get to know your bike and your efforts will not impact the warranty.

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I've heard horror stories about the bike now running right after messing with the carb settings.

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Say what?

It is really a pretty easy job. Take your time, do your research ( what jets will suit your needs best). Doing it yourself will not only save you 180 bucks, but i have yet to hear of anyone who did redo or tweak the bike afterwards each bike, local, and dealer will be different. If i spent $180 each time i tweaked i 'd be broke.
either way if you do it or the dealer (Pete's?) have them use the stainless allen screw kit from bellacorse or newbonneville. It is like $6 and the best $6 you'll spend. Also make sure they remove the air/fuel caps on the carbs. These will need to be tweaked with the weather.

I live across bmore (same altitude)and here was my best set up before the freak.
130 mains

stock pilots

tbird needle (14 dollars and worth it although i read better things about the thruxton needle)

near three turns but that changes with the ambient temp

If you go to Petes let me know what you think of their service. I have heard good, but what have they done for us lately.

Hi Loosend,

Pat, please feel free to use my observations if you like. You are the man!

Re Pat's direction's some observations in technicolour and words:


Tank console removal


Tank removal tip. Place a towel under rear of tank so when you lift front of tank to remove the vent hose

you won't scratch anything up. A full tank is heavy!



Battery removal T-27 tool required. Ground first!

Pat mentioned that the carb bowls should be drained. Do this before you drop the carbs! Less gas splashing around that way and the bowls should be drained regulary anyway! Draining the carb bowls.

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Underneath the rear fender, up where it connects to the airbox are (2) 8mm allens you need to locate and remove.

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These are 6mm. Break them free with the tool Pat shows then use a handled allen driver to speed removal. Removing the chain guard helps with the right allen bolt too! For tool illustration.

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I found it much easier in the long run to completely remove the retaining clamps for ease of removal and reinstallation later.

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Once you free up the air box, the carbs will slip off of the airbox rubbers. You may not need to remove the o-spring on either airbox rubber. The front rubbers will still hold the carbs during the airbox rear shift, and you may not have to remove the manifold to carb rubber retaining clamps. Note the things I just mentioned. Last time I removed carbs I did not have to remove either the o-spring or either manifold rubber retaining clamps. The temps where rather low though!

The next pic showing air box ready for the backward shift Notice the Starter Solenoid has been detached and the carb temp sensor too. The wire harness cover, the air breather, the faux air covers, the allen head bolts, all have been removed.

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Remove the breather hose and throttle position electrical connector

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once the carbs are free of the airbox and front rubbers. Much easier to do. Another photo of the throttle position electrical connector

Well there you have it. Moe's addendum to the pioneering work or Pat Whitbeck.

If you can tune a Holley 4-barrel carb, you can rejet the carbs on your bike. Call the guy at Bella Corse, tell him the pipes you have on the bike. He will send you the jets that match your system. He knows every system out there and give good advice. He's probably on the conservative side so there is little chance your bike will run poorly with the setup he advises. Jets are about $15, order the allen-head bolt kit for $7 and future changes will be a snap. $180 is probably a fair price from a dealer, but save your cash for other stuff.

My dealer is going to rejet, tune, etc., for $115 inclucing the jets.