Quote:

Personally I would prefer we discuss the general motor and carb modifications that still delivers great tq at lower revs.



Good enough.

I can only speak from research thus far but Ill say it again then...it looks like the 904 has limitations. That doesnt make it bad...its just limited in how much can be got.

Reflecting back on my conversation with Carlos about the limitations of the 865 High Compression kit I beleive the same factors will apply to the 904 upgrade.

Once the carbs are opened up (bore or biger carbs), the head is opened up (oversize valves, port and polish), the breathing is improved via cams the last limiting factor is how much air can those pistons compress.

The limiting factor in going with a higher compression is simply valve clearance. There is a balance in how much compression you can gain before you start banging against the valves.

Now...all we need is for Dave to add those cams and get dynoed again OR for someone to go ballstothewall with one of these and post some results...

Oh...cant forget Triumphtwinpower ingnitors...those seem to make a difference but are the cherry on top once everything else is tweaked. Of course thats not to say you cant get that cherry right now.


Last edited by Zmilin; 10/20/2009 11:04 PM.
SOLD: 07 Black BA, 39mm FCRs, TPUSA stage 1 head, TPUSA 813 cams, TPUSA 10.8:1 pistons, TTP #3 igniter, Specialty Spares Long Cannons, Tsukayu Hard Bags. 82HP/55tq NEW: 19 Goldwing Tour DCT