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| 89 yz 250 w/90 crankrod assembly https://vintagedirtbikeforums.alp-sys.com/viewtopic.php?f=28&t=4549 |
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| Author: | danb73 [ Tue Sep 22, 2015 1:40 pm ] |
| Post subject: | 89 yz 250 w/90 crankrod assembly |
Hi, guys trying to get some answers here first off got a basket case 89 yz 250 in-which i have (with some trial & error) rebuilt from the ground up. trying to put the finishing touches on it but just can't get the timing correct . i'm thinking because i swapped out the crankrod assembly to a 90 that i need to do the same with the stator plate already ordered part hopeing this will correct the problem. symptoms include rpms hanging (NOT RUNNING LEAN & PAST LEAK DOWN TEST) & power-band just not hitting as hard as it should powervalves are perfect as i said went threw this whole bike with a fine tooth comb ! i also noticed the stator pick-ups are spaced differently on the 90 then on the 89 i also am not sure if the flywheel is a different size for an 89 & 90 ?i can't seem to find much help maybe one of you guys have so in-site on the matter any help would be appreciated thanks Dan |
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