sixer3
04-22-2006, 01:04 AM
I've got an 05 with the "velocity" intake tube (ebay) wth a k and n filter and outer wear, hmf slip on,
and im a pretty experienced "jetter" imo
im running a 170 kehin jet, seems rich but its acually a perfect plug color....problem is i have good plug color all around with a 42 pilot and stock needle, but I have these problems
1. continuous crack on the throttle from no throttle to WOT it dies in 4-5 cracks...only under load
2. it idles but the rps seem to be pulsating, un-like any other 400 i own.... 1of 3 ...
3.if i pulse the throttle from no throttle to about 1/4 throttle then let off quickly as the engine decels it nearly dies then comes back up to idle
I've tried leaning and richening my air/fuel screw, richening and leaning my pilot jet, and checking for intake and exhaust leaks, and im at a dead-end....soon to be a 450r carb anways, just has me puzzled....
im also getting a spark knock(i think) at high rpms cold or warm motor, seems to possibly be a low octane ping.knock? on a stock bore??...........thanks for any help one may provide...
CHRIS
and im a pretty experienced "jetter" imo
im running a 170 kehin jet, seems rich but its acually a perfect plug color....problem is i have good plug color all around with a 42 pilot and stock needle, but I have these problems
1. continuous crack on the throttle from no throttle to WOT it dies in 4-5 cracks...only under load
2. it idles but the rps seem to be pulsating, un-like any other 400 i own.... 1of 3 ...
3.if i pulse the throttle from no throttle to about 1/4 throttle then let off quickly as the engine decels it nearly dies then comes back up to idle
I've tried leaning and richening my air/fuel screw, richening and leaning my pilot jet, and checking for intake and exhaust leaks, and im at a dead-end....soon to be a 450r carb anways, just has me puzzled....
im also getting a spark knock(i think) at high rpms cold or warm motor, seems to possibly be a low octane ping.knock? on a stock bore??...........thanks for any help one may provide...
CHRIS