06 50sx

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1/31/2019 5:15 PM

Motor fresh. Crank reused but inspected ok. New cylinder.( was off ebay. Us made) stator and coil also off ebay(us made). Bike has 180psi...seems high? New reed cage and reeds. Does not want to idle slows down and tries dying. A/f adjustment majes little to no change. Stock 3 turn out. Revs gd on stand? Boggy weak when riding? What can it be? Cant find air leak?


1/31/2019 5:28 PM


1/31/2019 8:47 PM

What about the clutch stack? Is this a new to you bike? Sometimes the a/f screw won't do anything if the pilot is too big.


2/1/2019 3:58 AM

Clutch has been measured and inspected. I havent done anything to affect jetting i wouldnt think its stock basically. Concernes with squish gap. 180 psi is high compression right?. My base gasket too thin?


2/1/2019 7:59 AM
Edited Date/Time: 2/1/2019 9:00 AM

Will it idle on a stand (when the back wheel is off the ground) as to eliminate any of the drive system? Does turning the air screw have any affect on how it idles? Open up the Carb and compare the idle and main jets to what is stock, also needle position. How does the plug look after it is run for a while? 185Lbs of compression isn't the issue, I would recommend doing a leak down test on it just to eliminate an air leak though (A compression test and a leak down are two different tests). How did the journals look on the crank where the seals run, did they have any grooves in them, the crank is 12 years old?


2018 KX450F
2005 KX250
2003 KDX 220
1984 KX 80
1982 RM 80
1980 RM 80
1977 XR 75
1969 Honda Mini 50