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Old 09-28-2017, 11:49 AM   #1
rccarlson22
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I've got the bike blues

Alright guys, KLX650 just had 2 of the valves replaced. I've cleaned the carb thoroughly, fuel starvation is not an issue. The clutch is adjusted properly and I don't feel any slip. (Maybe this is the problem and the slip is very minor). The bike runs fine, idles fine. It revs in neutral, but when running it on the road in gear, it takes awhile to rev up and it won't get all the way up there like it does in neutral. (Hence why I think it might be clutch related) it used to pull the wheel off the ground no problem now it feels like taking off is a chore. What do y'all think? Should I go ahead and check the clutch plates?
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Old 09-28-2017, 12:25 PM   #2
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you mentioned replacing valves. did you just replace them or was it a complete job? ie grind valves, set valve lash, replace seal?
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Old 09-28-2017, 02:01 PM   #3
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Compression check?

Sounds like it's not making power. Valve seating would be a suspect IMHO.

It might be carb related, as in, too rich/too lean. Any popping on deceleration?

If the clutch was slipping and power was good, then the engine would rev faster than the bike accelerates. Kinda hard to describe but you'd know it if you felt it.
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Old 09-28-2017, 02:30 PM   #4
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Compression test, leak down test and read the plug, move on from there
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Old 09-28-2017, 04:59 PM   #5
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Quote:
Originally Posted by mx6er View Post
you mentioned replacing valves. did you just replace them or was it a complete job? ie grind valves, set valve lash, replace seal?
Just replaced the intake valves
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Old 09-28-2017, 05:00 PM   #6
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Quote:
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Compression check?

Sounds like it's not making power. Valve seating would be a suspect IMHO.

It might be carb related, as in, too rich/too lean. Any popping on deceleration?

If the clutch was slipping and power was good, then the engine would rev faster than the bike accelerates. Kinda hard to describe but you'd know it if you felt it.

I've had clutch slip before and this doesn't feel like it but I thought it may be a factor because it revs fine in neutral but not in gear.
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Old 09-28-2017, 05:02 PM   #7
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Quote:
Originally Posted by skelator View Post
Compression test, leak down test and read the plug, move on from there
Thanks man, gonna link with Japawhat again, he fixed it originally he has my trust to fix it this time as well.
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Old 09-28-2017, 06:39 PM   #8
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Quote:
Originally Posted by rccarlson22 View Post
Just replaced the intake valves
what was the reason for intake valve replacement?
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Old 09-28-2017, 06:42 PM   #9
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The symptom described doesn't sound like a clutch slipping. A slipping clutch would not keep the motor from revving to redline.
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Old 09-28-2017, 07:43 PM   #10
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Quote:
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what was the reason for intake valve replacement?
The old ones were bent and thus didn't make compresion
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Old 09-28-2017, 07:58 PM   #11
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Did you just buy new valves and put them in?
No lapping etc?

I mean, i haven't replaced valves in a long time but I'm thinking they still need to be lapped to the seats. Amiwrong?
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Old 09-28-2017, 08:26 PM   #12
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Don't sound like a slipping clutch to me either .

Sounds to me that it could be main jet partial or completely clogged . Shouldn't take much to yank the carb and give it look .

Best advice I'm thinking from me , sell or park the bike in the corner , and come on down and pick up a 650l or 650R from me with a Sumo wheelset to go along with a dirt set .

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