Intake & exhaust modification
Intake & exhaust modification
(OP)
Engine:
Stock Honda 900cc motorcycle
4 overhead camshafts
4 valves per cylinder
4 carbs
4 into 4 exhaust
I am told any mods to the intake or exhaust on this engine will cause major problems. I would like to put 4 into 2 or 4 into 1 exhaust on this engine but do not want to re-jet the carbs. Does anyone have any thoughts or experience on this. Thanks
Stock Honda 900cc motorcycle
4 overhead camshafts
4 valves per cylinder
4 carbs
4 into 4 exhaust
I am told any mods to the intake or exhaust on this engine will cause major problems. I would like to put 4 into 2 or 4 into 1 exhaust on this engine but do not want to re-jet the carbs. Does anyone have any thoughts or experience on this. Thanks





RE: Intake & exhaust modification
RE: Intake & exhaust modification
This is not restricted at all to your engine, but the more finely an engine hs been optimised to an application and the vehicle optimised to that engine (gear ratios etc) more lkely you are to get a decrease in performance rather than an increase
Regards
Pat
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RE: Intake & exhaust modification
RE: Intake & exhaust modification
On most carbies you can access the jets by removing the top of the float bowel with the carby in place.
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
http://eng-tips.com/market.cfm
for site rules
RE: Intake & exhaust modification
RE: Intake & exhaust modification
The motor is pretty quiet at idle and cruise but barks pretty loud over 6000. The power band is good up to 6000 but just explodes after that all the way up to 11,500 which is as high as we've taken it. We did have the entire exhaust system except the mufflers ceramic coated which reduced the temp around the headers significantly.
We are happy with it and the system stays together.