250R crapping out on topend

**1984kxtTECATE** · 07-08-2005, 06:18 PM

See what happens when you buy a Honda lol.............j/k

**Fox250R** · 07-08-2005, 06:33 PM

lol yea!!! ITs been acting up for a while so i was too suprized...I just pulled my pressure plates out and all of them were warped LOL!! WTF?

**Fox250R** · 07-11-2005, 03:30 PM

I installed a new clutch today and holy crap its like a new bike...My motor pulls twice has hard from low to top..My clutch must of been really messed up..But i've run into another problem tho..I did a few plug chops and my bike is geting really hot. I pulled the plug and it was red hot..My plug was very light tan and dry..Im running a bR8 but i was thinking a Br9 might do the trick..This is my first time doing a clutch so im not sure if this would make my motor lean out?? In 6th gear it revs to the moon and it wants to wheelie! It has to be running lean..Is it normal for my motor to be getting this hot? Maybe i'll put a 175 back in and see what it does.........

**3leggeddog** · 07-11-2005, 05:10 PM

depends how hot is hot.it should not be over heating or ssurging during the plug chop.
if it surges during the chop it is lean,go up a half size.if is not surging or over heating i would say you found the sweet spot!!!post a pic of the plug,light tan is where you want it.

**atc86r** · 07-12-2005, 02:29 PM

Keep jetting. I've went as low as 162main and high as 178main. Your lucky if only 1 size will fit all conditions.

**Dammit!** · 07-12-2005, 10:22 PM

Take all those BR8's you have and throw them away. No reason to use those in your climate. Get some BR9's and it should be fine. Remember with jap plugs the lower the number, the hotter the plug.

**Fox250R** · 07-13-2005, 12:58 AM

Ok i did a few more chops today (jesus this is getting old) The 8s make my bike scream but runs lean and the 9s sputter on the topend and seem to be normal as far as the plug goes...So i guess ill just deal with the sputtering and run a 9...If it saves my piston so be it.......................

**Dammit!** · 07-13-2005, 01:34 AM

Sputtering is not normal. There's no reason to just live with it. Sounds like it's just running too rich still. If you jetted it with a hot plug in it, it's not jetted right for a 9 (which is what you should be using). If the plug starts looking light gray/white with a 9 in it and it's still sputtering you might have an ignition problem but I doubt that's the case from what you're saying.

This Honda civic air filter you mentioned has me curious. Got a pic of this thing? Not getting enough air has the same symptom as too rich of a main jet.

**Fox250R** · 07-13-2005, 02:47 AM

i'll get a pic of it as soon as i can man....Im running a 172 now,maybe i should put the 9 in and drop to a 170 but ill let you see my air filter first...And another thing my chock on my carb use to work lol but it doesnt now it idles the same with it on or off... what causing that? could whatever is going on be messing with that too?? thanks for the help!

I should have the filter pic in the next 30mins or so.....

**Fox250R** · 07-13-2005, 04:15 AM

heres my filter its off of a honda civic

**Dammit!** · 07-13-2005, 11:29 AM

Is it just a normal K&N under that sleeve? You can get a Uni that will clamp right to the carb for pretty cheap. That's what I did.

Is it ONLY doing this at wide open throttle? I would try the 9 plug and a smaller jet. Like I mentioned previously, I typically end up running a 175 main down here in the valley and at the dunes. I had to drop to a 165 up in Flagstaff though. Elevation, humidity, temperature, all those things have an effect.

The way I jet most of the time is to go too rich until it sputters, then start backing off until the sputter stops, THEN double check the plug.

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