Originally posted by Eddiesanders250
i set the decompressor clearance to spec, but it makes sense that the lever could be the problem..... At first we left the lid on because the instructions said nothing about removing it. we now have it removThey say to set the decompressor lever at .010, does that sound too tight?
I know that we were way far off at stock settings, the lever was way open, maybe thats how it should be?
Sound like your problem,your decompressor is way too tight

The way to adjust the decompresor,is to add .0.25(for 05 and after model) to your right side exhaust valve clearance to find the measure you should adjust the decompressor.

For exemple ... if your right side valve exhaust clearance was 0.28mm (stock spec),then you add 0.25mm and you will adjust your decompressor to 0.53mm.

The trick is too add 0.15mm (for 04-05 model) and 0.25mm (for 06 and later model) to your right side exhaust valve clearance to find the measure that you will adjust your decompressor.

I have adjusted 2 450R this week like that and the 2 run fine !!!