my 98 blaster boggs down

motocrossking

New Member
Apr 23, 2012
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fluvanna VA
It idles fine and revs fine but when i put it in gear and let off the clutch it boggs down and doesn't want to go. whats my problem? i think its the clutch
 
it rolls fine and has very good compression. but has no air filter. i just bought it. i payed 300 for it. i had to buy a wiring harness and a set of reeds for it. it starts with no problem. the guy i bought it from said it used to be raced so
 
Put an air filter on it and see how it runs. It's probably running lean because of it. What was the compression reading ? Do a plug chop after you get an air filter to check your jetting.
 
Get an air filter on it.

Plug chop.

Warm up motor to operating temp.

Fit new B8ES plug, ride through the gears and hold WOT in 5th or 6th gear for 10 seconds, or as long as you can safely.

Switch of the motor and pull in the clutch, roll to a stop.

Take the plug out and replace the old one for the ride home.

Carefully cut the threaded end off the plug to expose the insulator.

There should be a smoke ring of a cardboard or biscuit colour around the insulator.

If it is non existant or a very light colour, you are lean and require a larger main jet.

If it is a lot darker you are rich and may go down a size in main.

I prefer to run a little on the darker side, I may loose a little power but it is worth it for the peace of mind that I won't need a rebuild so soon.