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Old 01-01-2007, 07:47 PM
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Default Adjusting valves on 88 Moto4 225

Just wondered if anybody had the specs for valve clearance and what is the best way to gain acces to the adjustments. I have a ticking noise and I'm just trying to figure it out, is there anything else I should be looking at???
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Old 01-01-2007, 09:23 PM
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Default Adjusting valves on 88 Moto4 225

Valve clearances are: Intake - 0.05 - 0.09mm ( 0.002 - 0.004in. ) Exhaust - 0.11 - 0.15mm ( 0.0043 - 0.006 in. ) I used to have one years ago and just so happened to still have the service manual. Id start checking for the noise at the valves.
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Old 01-01-2007, 11:40 PM
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Default Adjusting valves on 88 Moto4 225

I would also check cam chain. On that old a unit you could be out of tension and slapping engine block.
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Old 01-02-2007, 02:49 PM
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Default Adjusting valves on 88 Moto4 225

Thanx for the info, I've done the valve adjustment and the tick noise is gone but I still have some noise from the chain area. Can I do a chain without removing the motor?????
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Old 01-02-2007, 03:18 PM
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Default Adjusting valves on 88 Moto4 225

Yes you can. The cam gear and adjuster, engine side cover and flywheel wil have to be removed. Flywheel takes a special puller but other than that it's not a hard job to do. Did you notice any marks where chain was flopping against block? If you replace the chain, I would put on new cam gear also. Good luck, TORK.
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Old 01-03-2007, 07:56 PM
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Default Adjusting valves on 88 Moto4 225

I have some grooving in the head and the chain is showing some wear, I guess I'll take her apart. Is there any aftermarket tensionors available? I can't seem to find any online but used ones on e-bay, Yamaha wants $80 (can) for the tensionor.
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Old 12-01-2012, 03:05 PM
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Default Yamaha moto 4 22

I have a moto 4 but how do i adjust the valves on it
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Old 12-01-2012, 03:05 PM
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Tags
225, adjust, adjusting, adjustment, cam, chain, check, clearance, moto, moto4, raptor450, specs, valve, valves, yamaha



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