Planet Minis

mxracer49 · 05-12-2008, 09:03 AM

Have a 02 XR70 I put a 88 kit on and cannot get this thing to run worth a ****. I've rejetted the stock carb to no avail. If I go to a larger carb what size should I go with? I'll also need a new manifold correct? All help appreciated. It's for the kids not me

Darin

spiralsun1 · 07-19-2008, 08:49 PM

I have the exact same problem, jetting doesn't help at all. Still working on it. I put the kit in a year ago -- still will not run beyond idle, backfires and bogs horribly.

357 Racing · 07-19-2008, 08:54 PM

Well i have a 20mm and I would want a 22mm even a 24mm flat side. Get a good intake.

firepower354 · 07-19-2008, 09:01 PM

Not much need for a bigger carb, with an 18mm intake port. Clean it up again, put the stock jets in except a 3 sizes larger main, move the clip one notch lower. Aftermarket filter and pipe? Add one more main size. Double check the cam timing. Seen too many carbs blamed wrongfully

project-c2 · 07-21-2008, 09:43 AM

If it is the carb, TB 20mm carb kit. If it's timing, readjust your cam gear...

spiralsun1 · 07-30-2008, 02:12 PM

Quote:

Originally Posted by firepower354

Not much need for a bigger carb, with an 18mm intake port. Clean it up again, put the stock jets in except a 3 sizes larger main, move the clip one notch lower. Aftermarket filter and pipe? Add one more main size. Double check the cam timing. Seen too many carbs blamed wrongfully

Ya, jetting did nothing whatsoever. I tried every jet and clip position etc. I really think it is the cam chain now... going to fix that RIGHT NOW!

spiralsun1 · 08-05-2008, 09:54 AM

its not the cam chain. I am thinking it is something electrical. I think the spark is not advancing..? nothing seems to change at all how it runs.

Did I mention how bad this sucks? It has been over a year and I still can't get this thing to run. I have not been able to ride with my son in 2 years.

05-12-2008, 09:03 AM	#1 (permalink)
mxracer49 1st Gear Member Join Date: Oct 2007 Location: Kansas Posts: 111	XR70 with 88 Kit Carb Help Have a 02 XR70 I put a 88 kit on and cannot get this thing to run worth a ****. I've rejetted the stock carb to no avail. If I go to a larger carb what size should I go with? I'll also need a new manifold correct? All help appreciated. It's for the kids not me Darin

07-19-2008, 08:49 PM	#2 (permalink)
spiralsun1 PM Newbie Join Date: Jul 2008 Posts: 28	Re: XR70 with 88 Kit Carb Help I have the exact same problem, jetting doesn't help at all. Still working on it. I put the kit in a year ago -- still will not run beyond idle, backfires and bogs horribly.

07-19-2008, 08:54 PM	#3 (permalink)
357 Racing 3rd Gear Member Join Date: Dec 2006 Location: Austin, Texas Posts: 3,576	Re: XR70 with 88 Kit Carb Help Well i have a 20mm and I would want a 22mm even a 24mm flat side. Get a good intake.

07-19-2008, 09:01 PM	#4 (permalink)
firepower354 3rd Gear Member Join Date: Oct 2006 Location: Flint MI Posts: 6,255	Re: XR70 with 88 Kit Carb Help Not much need for a bigger carb, with an 18mm intake port. Clean it up again, put the stock jets in except a 3 sizes larger main, move the clip one notch lower. Aftermarket filter and pipe? Add one more main size. Double check the cam timing. Seen too many carbs blamed wrongfully

07-21-2008, 09:43 AM	#5 (permalink)
project-c2 2nd Gear Member Join Date: Jun 2008 Location: Honolulu, HI Posts: 275	Re: XR70 with 88 Kit Carb Help If it is the carb, TB 20mm carb kit. If it's timing, readjust your cam gear...

08-05-2008, 09:54 AM	#7 (permalink)
spiralsun1 PM Newbie Join Date: Jul 2008 Posts: 28	Re: XR70 with 88 Kit Carb Help its not the cam chain. I am thinking it is something electrical. I think the spark is not advancing..? nothing seems to change at all how it runs. Did I mention how bad this sucks? It has been over a year and I still can't get this thing to run. I have not been able to ride with my son in 2 years.

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