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Fast by Basque
Fast by Basque, Motorcycle Mechanic
Category: Motorcycle
Satisfied Customers: 99
Experience:  15 years in multi-line dealers, and 5 years of unofficial experience; specialized in engine building
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why is my 82 yz490 such a powerful bike

Customer Question

when u gas it it just wants to wheelie and rip u off the seat why is it so powerful
Submitted: 9 years ago.
Category: Motorcycle
Expert:  Fast by Basque replied 9 years ago.

ah one of the good ones!. well they work exceptionally well. they run a 2 stroke air cooled engine . bore of 87mm and a stroke of 85mm , overall displacement = 487cc. engine is classified as a torque induction.with a compression ratio of 7.0:1 .its fueled through a huge 38mm carb mikuni 38ss/5x6-00 , runs a main jet of 440 (wow) and a pilot of 50.these engines are tuff as long as you are anal on the maintenance. run excellent fuel, top of the line 2 stroke oil, and a well recommended base oil. always keep the air filter clean and heavy oiled , good idea to have a spare on hand so you have a clean one every ride.

hoped this helped you if so please accept, thank you.

Customer: replied 9 years ago.
yes but is the front end to light or is the hp too much and what is the hp and top speed of this bike?

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