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powroll
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Posted by: 250excrf250r

just wondering about powroll i ahave what is in my sig and looking for more speed what should i do i was thinking about this what is any othert suggestions and comments

Posted by: rev-man

thumper racing 280 kit flat out

Posted by: ryanh250ex

See the FAQ at the top of the page, if you insist on boring it out the thumper kit is probably the best.

Posted by: hellshot00

Im thinking about buying the thumper racing big bore kit but is there any downsides like not being able to do short little drags or haveing to ride it hard so it dont stall

Posted by: ryanh250ex

quote:
Originally posted by hellshot00
Im thinking about buying the thumper racing big bore kit but is there any downsides like not being able to do short little drags or haveing to ride it hard so it dont stall

???? why would it do that?

tune it right, run the suggested octane level and it will be fine.

Posted by: hellshot00

well i heard bout the 450 kit for the 400ex and wht not and u cant do short drags u gotta ride hard or it will stall i was just wondering

Posted by: ryanh250ex

quote:
Originally posted by hellshot00
well i heard bout the 450 kit for the 400ex and wht not and u cant do short drags u gotta ride hard or it will stall i was just wondering

???? Either the cam is WAYYYYY too big, or they did something like put in a very light flywheel.

again... tune it right, run high octane gas (premium or race gas of your choice) and go ride.

Posted by: TRXRacer1

quote:
Originally posted by hellshot00
well i heard bout the 450 kit for the 400ex and wht not and u cant do short drags u gotta ride hard or it will stall i was just wondering

Yeah they botched something here.

Posted by: hellshot00

ok thanks but one thing what would happen if i ran cheap gas in it ? like wht would the consuquences b

Posted by: m.h.s.c.#527

pre ignition (ignites on the way up) and knocking