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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
Acc. Pump Tuning?
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[QUOTE="DEANSFASTWAY, post: 716579, member: 31309"] Fark those stock idle mixture screws tend to fall out also. New ones are @ $10. We like to knacker up the last few threads on the screw to help it stay in .I know some wiseass will say it sounds butcherous but thats what helps. The zipty screw is trick though.Also the carbs can tend to pop out of the intake boot on hard jump landings and so we tastefully safety wire them to the top motor mount.Sometimes on dirty old YZFs the accel pump parts can actually get all corroded in the pump body and not work but Ive only seen that on 2 or3 older 400/426s. If it bogs off idle in neutral and not while riding there may not be anything wrong and you might be searching for a needle in a haystack . When these bikes are put in gear the ign timing changes.. I have done the accel pump mod on these bikes but only on woods riders where theyre constantly blipping on and off throttle.Does the hot start work correctly if aftermarket , isit stuck ? If its a Dubach and its stuck Doug will send you out a new one when he receives your old one ,there was a tolerance problem on some of his early production causing them to stick. He makes good . Hes a good dude . If no D/hotstart then you should buy one even if youre not racing.That and by all means get that 03 ex cam in there , It makes all the difference in the world when starting the older YZF .Ive got a couple of them let me know if you need one. Did you go to the jump show at the Spectrum? It was too cold to party in the parking lot thats for sure! Good Luck [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
Acc. Pump Tuning?
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