Clutch problems need HELP

[Mongo 1]

Definitely set up your clutching to spec, but have you checked all other possibilities. An air box leak will keep the slides from opening properly reducing top rpm. Have you done any jetting, and how it run otherwise?

 

[Len Todd]

Re: rpm

then after i ajusted it i wouuld check it after evey ride and found that it would move a little after evey ride so i built a moter tensioner this solved the problem as it never move agein.

BJ: What did you put together for a tensioner, and where did you put it?

 

[Smokey]

Ooooooops. Sorry Grader I posted 264 mm. It should have been 267 mm. At best it is out 3 mm, about 1/8 ". Doesn't seem like much but I will be adjusting it to spec. Hopefully that will help. Airbox is fine. Everything is stock. It runs real good in fact by the seat of your pants it feels normal. But I am sure there is performance loss not pulling proper rpm. Thanks again everyone.

 

[rxrider]

You should also check your clutches (engine vs jackshaft) for parallellism. If you have a clutch alignment tools this is easy. If you don't have the tool you can place a strait edge on the inside of the primary clutch stationary sheave, the straight edge have to lay flat on the back of the sheave pointing backwards behind the secondary sheave. You can now measure the distance from the straight edge to the front of the secondary sheave, take notes, repeat at the rear end of the secondary. You should get the same measurements both front and back of secondary sheave, if so your engine and jackshaft are in parallell, that's a good thing. If your clutches are aligned you can now look at your notes, if your measurement is 15 mm +/- 1.5 mm offset is within spec.

Get the SledPro clutch alignment tool, it makes everything really easy.

On more thing to check is the rubber diaphrame inside the top cover of your carbs, if one of them fail slide bodies will not lift in sync and cause performance loss. Have you syncronized your carbs lately?

 

[Blue shadow]

With the sledpro clutch alignment tool I had to remove the two off set washers .I have tentioners on both sides of the engine so it can t move.

 

[Len Todd]

Would only get 9,000 RPM when I pin it.

How you makin' out Smokey? Been watching this thread for several days. Last year, I too had a machine that would not rev past 9000. Over the summer, I did typical clutch maintenance. Today, I took it out and now get 10,200 with a fairly quick move up to 10,500-10,600. With one tooth out of the gear, I saw 116 mph on the meter. This makes the ol' clunker good enough for me!

What I ended up doing to get the Rs back was:

1. Cleaned and went through both clutches. All wear parts were measured and found within spec, except the Primary's roller bushings. These were worn fairly badly (~ 008" out of spec. ) Replaced the bushings.
2. Replaced both the primary and secondary springs. Went to OSO in Primary. Stayed stock in Secondary. Secondary is twisted to 70 degrees.
3. After still not seeing all the desired Rs on my first ride this year, I also removed the Deflection Quick-Adjust (Pioneer Perf?) and returned to a floating secondary. And, bingo, went right back up to 10,200 - 10,600.

This A.M., I also measured the CTC. It was 268.5 mm. I am not sure if the engine actually moves under power or not. However, at this point who cares. I got the Rs that I was looking for.

Hope you got your problem ironed out!

 

[Smokey]

Update. SRXTWINS (Brian) helped me out and we checked the C to C. It was fine. So he was so kind to take the primary and secondary off his 03 and I tried it on mine. He has the mountain springs that everyone has been suggesting I get. Took it out and it pulled like a race horse 10,200/10,300. Unfortunately Brian wanted his clutches back. In any event I have ordered the new springs they will be in on Wednesday. I was going up to REVSTERS cabin for the weekend so I wound the secondary to 70. Didn't change a thing still pulling at about 9,200/9,300.

I have a feeling that the springs may not solve the problem but I will find out on Wednesday. Brain has checked out my primary and secondary. I had already change a bushing in the secondary. He says there is a little slop in the primary rollers. The good thing is I now know it is in the clutches not a motor or carb problem. Thanks again Brian.

Will change the springs on Wed and update. This thing is PISSING ME OFF.

I am sure REVSTER will comment how he took advantage of me and made me race him on the weekend. Spanked me bad. Go ahead REVSTER we are anxiously waiting for your comments.

 

[Len Todd]

Drive belt is new. I changed belts when I had the problem at the end of the year but that didn't change a thing. I have now changed both springs but now all our snow is gone so I am waiting to try it. 7000 miles on the sled. Hopefully the problem was the springs.

Not sure I understand the need for more Springs??? But, when you are done, have new ones in both clutches. Put an OSO in the primary, and a new stock one in the Secondary works fine. Also, replace the rollers' bushings. A few thousandths there is a lot of slop. Do you have adequate endplay for the secondary to move back and forth on the Jackshaft? Should be ~ .060" endplay. I had the same problem as you. And, until I returned the secondary to floating (vs. Fixed), I did not get all the RPMs back.

 

[revster]

Update. SRXTWINS (Brian) helped me out and we checked the C to C. It was fine. So he was so kind to take the primary and secondary off his 03 and I tried it on mine. He has the mountain springs that everyone has been suggesting I get. Took it out and it pulled like a race horse 10,200/10,300. Unfortunately Brian wanted his clutches back. In any event I have ordered the new springs they will be in on Wednesday. I was going up to REVSTERS cabin for the weekend so I wound the secondary to 70. Didn't change a thing still pulling at about 9,200/9,300.

I have a feeling that the springs may not solve the problem but I will find out on Wednesday. Brain has checked out my primary and secondary. I had already change a bushing in the secondary. He says there is a little slop in the primary rollers. The good thing is I now know it is in the clutches not a motor or carb problem. Thanks again Brian.

Will change the springs on Wed and update. This thing is PISSING ME OFF.

I am sure REVSTER will comment how he took advantage of me and made me race him on the weekend. Spanked me bad. Go ahead REVSTER we are anxiously waiting for your comments.

I take no pride in kicking you while you're down Smokey. I will wait till you get your clutches working to their full potential then we will face off again.

 

[snowbeast]

Clutch update. I was out on Wed put on about 80 miles. Clutch was pulling about 8,900/9,000 it is now up to 9,300/9,400. Springs helped a bit. Checked the center to center with a tape measure (didn't have a proper tool) Manual says it should be 270 mm. It is at best 264 mm. I know that may not be a very accurate way of measuring. Would 3 mm which is about 1/8" make a difference ????

Dude you are talking 6mm which is around 1/4 inch and yes it meand your center is to close and your belt will act to long,like your in 4th gear when you want 2nd.

 

[Smokey]

Update...Changed my springs and the last secondary bushing. (Changed one before) It is now pulling about 10,000 RPM. Almost there.

 

[Len Todd]

Did you get those Primary Roller Bushings yet?

 

[Smokey]

Have not changed the primary rollers yet...