Posts
439
Joined
8/20/2012
Location
Aliso Viejo, CA
US
7eleven
3/25/2013 9:22am
3/25/2013 9:22am
Edited Date/Time
4/13/2017 8:23pm
I have an 03' 250 and after I replaced a top-end last week, I started have this reoccurring problem.
It runs great for about 10 minutes, then it loses about 30% power all of a sudden. keeps running, just no revs. It turns into a moped...
What i've done so far: pulled cylinder to check piston, ok. checked reeds, changed fuel, cleaned carb.
If bike sits for a minute it goes back to running fine.
When it happened in my 2nd moto this weekend, I kept on truckin with it, like the first moto. I had a pretty big get-off in the 2nd moto and when I picked the bike back up and started it, it was back to running normal for the rest of the moto. WTF!!!
I'm lost, it may be the Devil....
711
It runs great for about 10 minutes, then it loses about 30% power all of a sudden. keeps running, just no revs. It turns into a moped...
What i've done so far: pulled cylinder to check piston, ok. checked reeds, changed fuel, cleaned carb.
If bike sits for a minute it goes back to running fine.
When it happened in my 2nd moto this weekend, I kept on truckin with it, like the first moto. I had a pretty big get-off in the 2nd moto and when I picked the bike back up and started it, it was back to running normal for the rest of the moto. WTF!!!
I'm lost, it may be the Devil....
711
The Shop
Strange that it runs good for 10 minutes and then shits the bed though. Maybe something electrical/heat related!?!?
Runs good til it gets hot and then cant deliver enough juice.
Here is a cheap servo replacement. http://www.ebay.com/itm/Mabuchi-RS-365-SH-Motor-6-to-20-VDC-Appliance-Motor-/280736861168?pt=LH_DefaultDomain_0&hash=item415d388bf0
1st $650
2nd $260.....grrrrr.
I had that race in the bag.
I took the day off work this thursday and I'm bringing a 2nd bike to my practice session, I'm just going to start changing electrical parts one by one. I'm starting with the kill switch...
As soon as I find the problem, I'll post it up!
Braap, Braap, Braaaaap!
If its not getting a strong spark, and the problem is electrical, i'd think the plug would look dark and wet. If the problem is some sort of funky air leak that only happens when the bike is red hot, then itll be pretty white.
I reccomnned switching to the Mabuchi motor, and sealing the servo housing with a little silicone to every CR owner.
and cable tension. some will try to tell you that a little slack in the cable will soften the hit, but all you are doing there is not letting your powervalve fully function in it's range of motion. you don't want it like a banjo string, but damned close.
I was always told they either work or don't work, no in between, but it was not the case with mine.
TM
Pit Row
Good luck 7 eleven!!
Like I said earlier, I crashed it late moto pretty hard, picked it up and bump started it and she was back to ripping mode! so there's the only when it's hot factor out the window...
I hate raceday testing!
Don't think this would necessarily cause the same symptoms, but after it was gone and talking to many people we figured it was probably the stator side main seal. Honda had a huge mess of a problem with those and I even saw off the showroom bikes dripping oil.
Electrical issues are brutal, more frustrating then anything else.
Post a reply to: Honda 250 2-stroke mystery problem, need help!