I just put a bender race pipe on my 90 Exciter, Do I need to re-jet the carbs? Thanks for any help
horkn
New member
I would plan on re jetting
Classic SRX
New member
From looking at the Tech pages here, the stock main jet on a '90 EX is a 320. Dynotech EX II pipe shoot-out (V4N3) tested the Bender pipe at 89.5hp @ 7500 RPM with 280 mains. Have to note that the temp during the test was 60 deg F. Maybe aim for 300's to be safe for 30deg F???
A.
A.
thanks! I wonder if 310 - 320 running @ 5 -10 degrees F
well, I tried getting ahold of Bender with no luck. I was talking with a guy that said I should go to a 340? thats going the wrong way isnt it? help......
Generally when changing to an aftermarket pipe your going to have to go bigger on the mains. The pipe flows more air thus you need more fuel. If I was doing one by feel I'd go up 2-3 sizes from stock and see how it responds. Then go from there. I'd rather start rich and work leaner than start lean and have to buy pistons if it's not caught fast enough.