Carb cleaning

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Yama nubie

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Oct 5, 2015
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Michigan
Sorry if this is a redundant thread.

I bought a couple of yamaha snowmobiles last year and I'm new to the maintenance. I'm pretty good at following instructions and turning a wrench but I'm nervous about pulling apart the carbs. I've read the stuff on this site and it looks pretty straight forward but after I get them cleaned and put back together, do I need to synchronize them? What is involved with this? Any tips/tricks things to watch out for?

I'm also thinking about pulling the primary clutch for cleaning. Any novice mechanics try this with good results?

Any words of encouragement?

I have a 2000 SX700R, 1994 Ovation and a 2011 Venture
 
You usually don't need to sync the carbs when cleaning them. You shouldn't have to pull the clutches to clean them, just remove the cover and blow them out good with compressed air.
 
The clutch seemed to work great but I doubt it was ever cleaned (3000 mi). When I used the compressor repeatedly dust kept coming.
 
If you have a puller I would take the clutch off. Spray down and soak in favorite cleaner and run through dishwasher. Apart is best. Will look brand new. Then take a wet green scotchbrite pad and scuff the sheaves, inside out. Then after you put back on final wipe with acetone on sheave. Should not have to sync carbs so don't even worry about that, cleaning is most important. I would do secondary as well. And same with belt, hot soapy water and a scrub with green scotch brite pad! If never cleaned you will feel the difference on belt grab for sure.
 
Thanks, i plan to get a clutch puller and try the dishwasher thing. How do you hold the primary together when you remove the sheave cap bolts? Does everyone buy a sheave compressor or is there a trick?

Funny I'm from Freeland and Gaylord too!
 
No need for a spring compressor. Stock springs are not that stiff. You can do everything by hand for both primary and secondary. Just loosen equally and support by hand. That's funny where u at in Freeland and Gaylord? If ya need any help let me know I know the sx pretty well also. We have 3 in our group. I don't have my puller here but if your waiting I can bring it home with me in 2 weeks. If ya buy one go OEM they are strongest. Then then tip Sled on side and fill clutch bolt hole with water or hydrolic fluid. Wrap your puller in Teflon tape and go at it. The fluid will act as hydrolic and pop that clutch right off. Let me know if ya need anything or help. Always willing to lend a hand or wrench. Chris
 
If leaving on the sled slowly turn the bolts lose so they all come out the same and be very careful not to let the spring shoot the clutch cover at you it (hurts!!) also make sure to put it back together the right way just line up the x's and you'll be good. If you pull it off the sled then a compressor is best you can buy them or build your own.
 
Thanks for the advice. Are you taking apart the spider too or just the sheave cap, spring and weights?

Chris I may contact you if I get stuck. The sleds are up north anyway so I can only work on them during the weekends.
 
Yama nubie said:
Thanks for the advice. Are you taking apart the spider too or just the sheave cap, spring and weights?

Chris I may contact you if I get stuck. The sleds are up north anyway so I can only work on them during the weekends.
Click to expand...

No I just take cap and spring out. Sometimes the weights. No need to mess with spyder just for cleaning. Seeing its the first time for a good cleaning the weights would be a good idea. I'm up most weekends so pm me if ya run into problems.
 
OK took the primary off. No problem. Pulled it apart an look what I found....broken spring. I have no idea when it happened? Maybe when I opened it? The sled rode fine last year.

Where is a good place to get this part? Do dealerships usually stock?

20151122_122506.jpg
 
Dealer will have them lots of places online will to. Someone on here might have one they want you get rid of.
From the looks of that spring its been broke for a while you probably rode with it like that. Sometimes you can't feel a difference sometimes you can.
 
Cleaned the carbs today. Not a bad job once you decide that it can't be done without removing the airbox.

All of my pilot jets were plugged and there was some nasty slimy white goo in one carb. I'm glad I decided to take everyone's advice and clean them.

I have a question about the pilot air screw. Mine were all set to 1.75 turns and the specs are 1.5 turns. Should I put them back to 1.75 or reset them to stock?
 
Thanks it ran well last year so i assumed it was right. Now I just need to get the clutch installed so I can start it up.
 
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