granto211
TY 4 Stroke Junkie
Ses to be bouncing of the rev limiter when i crank on it. Just bounces aboug 2 or 3 times when j first punch it.
Wait, when you crank the engine over, or when you accelerate hard? What rpm are we talking about. Please explain further
theCATman
TY 4 Stroke Master
- Joined
- Feb 19, 2007
- Messages
- 1,366
- Reaction score
- 303
- Points
- 1,188
- Location
- WI
- Country
- USA
- Snowmobile
- Yamaha
His "cranking on it" is his way of saying punching the throttle wide open.
Sounds to me like either belt slip or track spin. No other way the engine could over-rev.
Are you sure it's the rev limiter, and not the TORS activating for some reason?
Yes, explain further. Is this from a dead stop?, or rolling & anytime you go wide open?
Sounds to me like either belt slip or track spin. No other way the engine could over-rev.
Are you sure it's the rev limiter, and not the TORS activating for some reason?
Yes, explain further. Is this from a dead stop?, or rolling & anytime you go wide open?
granto211
TY 4 Stroke Junkie
Its only when wfo and theres no real performance issue. It could be related to track sliping to the ground. Usually about 10800rpm.
granto211
TY 4 Stroke Junkie
I got it on go pro vid but its to big to upload
the kitchen
Expert
Do you have tip weight added to your Ulmer kit? You need to add two grams to the tip and its fixed.
langow
Expert
granto211 said:Its only when wfo and theres no real performance issue. It could be related to track sliping to the ground. Usually about 10800rpm.
10,800 is good. Your NOT hitting the rev limiter at that RPM. Or are you suggesting your RPM's are exceeding this by a lot on occasion?
- Joined
- Apr 17, 2003
- Messages
- 5,481
- Reaction score
- 1,281
- Points
- 2,003
- Location
- Menno, SD
- Website
- www.ulmerracing.com
- Country
- USA
- Snowmobile
- 2014 Yamaha SR Viper LTX, 2014 Yamaha SR Viper RTX SE, 2015 Yamaha SR Viper MTX SE 162 (turbo), 2015 Yamaha SR Viper MTX SE 153
- LOCATION
- Menno, SD
- WEBSITE
- www.ulmerracing.com
If it's hitting it at the first stab of the throttle then add a washer or two to the heel.
granto211
TY 4 Stroke Junkie
When i full stab it will bounce after about 2 seconds
Either I am drunk or you are. Speak in full sentences, proof read, and see if what you are explaining makes any sense. 10,800 is right on spec for WOT. If reving far beyond that, I assume Mr. Ulmer is giving you best advice for his clutch kit, and yes, check belt codition. 

theCATman
TY 4 Stroke Master
- Joined
- Feb 19, 2007
- Messages
- 1,366
- Reaction score
- 303
- Points
- 1,188
- Location
- WI
- Country
- USA
- Snowmobile
- Yamaha
granto211 said:When i full stab it will bounce after about 2 seconds
Once again, since you haven't answered it yet.... is this from a dead-stop going WOT? OR while rolling at say... 30,40,50 MPH and going WOT?
If it's from a dead-stop, you're spinning the track excessively (learn some throttle control)
If it's from a roll at speed, somethings amiss in the clutching as Mr.Ulmer suggested.
sleddog66 said:Either I am drunk or you are. Speak in full sentences, proof read, and see if what you are explaining makes any sense. 10,800 is right on spec for WOT. If reving far beyond that, I assume Mr. Ulmer is giving you best advice for his clutch kit, and yes, check belt codition.![]()
This is funny for telling someone to proof read. You are missing an N in the word condition.

granto211
TY 4 Stroke Junkie
Jeez u sure are an angry fella. I may have had a few white russians in me but thats besides the point.
Its kinda hard to discribe and type on my phone. Im trying to get my go pro vid to upload an u can hear it yourself. Its deff in the clutch weights and its not on launch. Its more when im approxhing 70-90mph, u cant feel it or notice it besides the sound.
Its kinda hard to discribe and type on my phone. Im trying to get my go pro vid to upload an u can hear it yourself. Its deff in the clutch weights and its not on launch. Its more when im approxhing 70-90mph, u cant feel it or notice it besides the sound.


Super Sled
Lifetime Member
- Joined
- Feb 25, 2009
- Messages
- 3,631
- Reaction score
- 5
- Points
- 1,218
- Location
- Riding on the North Shore, MN
- Country
- USA
- Snowmobile
- Summit X
Srxspec said:If it's hitting it at the first stab of the throttle then add a washer or two to the heel.
Obviously your clutching is off, causing an over rev. This is bad for your motor and can cause damage, so I'd fix it. Curious, are you using stock weights, or an aftermarket clutch kit?
If you have a clutch kit, you can bring your RPM's down several ways. First, you can try what Ulmer is recommending here by adding weight to the heel. If tjhat doesnn't work then try removing some from the tip weights.
granto211
TY 4 Stroke Junkie
here is a clip of it bouncin
between 3-6 sec when its doing it
http://www.youtube.com/watch?v=4K4FU01X ... e=youtu.be
between 3-6 sec when its doing it
http://www.youtube.com/watch?v=4K4FU01X ... e=youtu.be
Similar threads
- Replies
- 1
- Views
- 802
-
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.