Question about 2002 Yamaha TT-R 250
When i rebuilt my top end i didn't mark the chain or sprocket now my bikes wont go because the timings out can some one plz help !!!!!!!!!!
p.s u guys rock !!!!!
There should be a timing mark on the magneto, rotate crank until line is visible thru inspection hole. This will position engine at Top Dead Centre. Have head complete with gaskets, valves, springs and camshft in place and position with camshaft chain in ready position, (you have to hold chain thru camchain opening) Place head on and bolt tight (no need to torque down yet) and pull camchain tight on opposite side to tensioner (fully loosened) and feed over camchain sprocket, take up tension with tensioner screw/bolt. This will have engine TDC with valves closed (as if to fire) rotate engine by hand and ensure tracking of camchain and tension is steady on chain. Valves should actuate in time. Have a close look on camchaim sprocket and a mark of some sort should show against corresponding mark on camshaft journal cuos.
Need the Manual: Down load from the link above, enter model, make year and download for free. (It's in four languages however) The relevent detail is in chapter 4-8 to 4-13. I think, Cheers.
Posted on May 02, 2010
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Posted on Jan 02, 2017
Tips for a great answer:
Fig. Lining up the crankshaft sprocket mark with the colored link in the 5 o-clock position (2).
Fig. Aligning the intake camshaft sprocket mark with the colored link in the 2 o-clock position (1).
Fig. Aligning the exhaust camshaft sprocket (3).
Fig. Compressing the timing chain tensioner-2.2L engine.
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Right camshaft sprocket timing mark
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