Clutch Slip and Vibration

Question:

The clutch is slipping sometimes and also has a slight vibration, but not all the time. ? It has only done 4500klm. {Darryl, Tasmania, Australia 2001 Suzuki LT250 Quad Runner 2wd Quad}


Answer:

The clutch slip and off and on vibration can be caused by quite a few things. The good news is that they are all under the clutch cover, so you can check for all possibilities in a short amount of time.

I do not believe that the fact that you have only put 4500 km on the ATV really matters. It is more the roughness of the terrain, heat and riding style that will wear out clutch components.

Refer to the parts diagram below. All of the numbers in parentheses { } reference items in the parts diagram. I will work from just under the cover, towards the engine. If the first or second item on the list seems to fit the bill, do not stop, keep working your way down the list. It could be a combination of things.

Be aware of the orientation of the parts you remove. You will need to replace them in the same way. Focus on what you are doing and limit distractions. It may be helpful to use a Sharpie or other permanent marker to put a small dot at the 12 o’clock position of all parts or take a digital photo to help jog your memory during reassembly. It may sound silly now, but if you need to order a part it could be a week or more before you are able to install it. Are you sure that you will remember how it goes?

2001 Suzuki LT250 Clutch Fiche Diagram



Some possible causes for your problems are:

  • The nut {12} in the center of the clutch can become loose. This can cause both slip and vibration.
  • The clutch plates {14} may be worn and in need of replacement. The first sign of wear is usually slippage, chattering and/or vibration. Your quad has seven drive plates, Suzuki Part number 21441-22A01. You can also purchase them from aftermarket suppliers like EBC and Barnett.
  • The aluminum basket or primary gear assembly {8} is riveted to the steel gear. The differences in heat absorption and dissipation as well as just normal engine vibration can cause the rivets to become loose or break. When the basket rocks on loose rivets this causes vibration also.
  • Check the nut {5} under the basket, it can become loose. This can cause both slip and vibration.
  • Next is the one way clutch assembly {4}. This is a centrifugal clutch. You will see that the clutch basket has teeth on it. Those teeth drive the one way clutch assembly. It has small springs and weights on it. The springs lose tension over time, with lots of use and heat. The hotter the springs get, the softer they get, causing slippage when the engine is hot. The weights are similar to brake shoes. When they are worn, they slip.
    Other manufacturers sell the springs and weights separately, and you can rebuild the centrifugal clutch. Suzuki calls theirs a one way clutch assembly and sells it as a unit, part number 21500-19B21.
  • Also check the inner race {2} and one way clutch {3} for wear. Although it is less likely that these are causing your trouble, if the one way clutch assembly {4} is badly worn, it could have damaged 2 and 3.



We see this problem very often in the Honda Rancher, not so much in the Quad Runner. But then again, I have never worked on a bike from Tasmania.

I hope it turns out to be nothing more than a loose nut. Good luck and do not forget to order a Clutch Cover Gasket, Suzuki part number 11482-19B12.


Need more free ATV or motorcycle repair information?



Q&A:  Leaking Fuel Valve?
Q&A:  Leaking Gas Valve flooding engine?
Q&A:  Battery Maintenance
Q&A:  Battery Types
Q&A:  Carb Jetting page 1
Q&A:  Carb Jetting page 2
Q&A:  Aftermarket Exhaust System
Q&A:  Carb Float Needle
Q&A:  Carburetor Identification

Q&A:  Honda Points
Q&A:  Rim Bolt Pattern
Q&A:  CB750F Identification
Q&A: Broken Speedometer Cable End
Q&A: Suzuki LT-Z400 QuadSport Tank Removal
Q&A: Motorcycle Trike Conversion
Q&A: Honda Rancher Reverse Problem
Q&A: Kawasaki Z650SR Fuel Mix problem
Q&A: RM80 Piston Position

Q&A: LT80 Engine Oil Issues
Q&A: Clutch Cable Break In period?
Q&A: Cooling Fan Problem?
Q&A: 1983 XV920 Virago Oil Change
Q&A: ATC90 Spark Plug question
Q&A: Nighthawk 750 Spark Plug Gap
Q&A: Bike Registration Problem
Q&A: Lost Hypercharger Instructions
Q&A: Bourget Charging System

Q&A: Can Spark Plugs be cleaned?
Q&A: Wheel Bearing Removal for 1976 CB750K
Q&A: 1982 YZ490 Kick Start
Q&A: 1979 GL1000 Goldwing Points Gap
Q&A: 1982 GS650GLZ Cable Routing Problem
Q&A:  Ether vs. Carb Clean
Q&A:  ATV Ignition Trouble
Q&A:  John Deere backfiring
Q&A:  Honda Phantom 200 Tire Pressure

Q&A:  TRX350 Clutch Slip possible causes
Q&A:  LTF250 Cam Chain Installation & Timing Marks
Q&A:  Demon X pit bike clutch trouble
Q&A:  OK to Increase Tire Size?
Q&A:  RV125 Lost Keys
Q&A:   1981 GPZ550 flywheel cover
Q&A:   2000 Yamaha Badger : Hard to start
Q&A:   1975 CB360T Replacement Tire
Q&A:   Vintage CB750 Chain Size

Q&A:  LTA500F Vinson Leaky Fuel Petcock
Q&A:  TRX350 Rancher Hard Shifting
Q&A:  Replacement Rectifier
Q&A:  GS500F Turn Signals
Q&A:  Suzuki Quad Poor Idle
Q&A:  Yamaha Wolverine cracked Carb top
Q&A:  Vulcan Classic VN1600 Cold Start issues
Q&A:  1980 GS1000 with No Power
Q&A:   High Octane Fuel

Q&A:  Suzuki Bandit 1200 Water in the Oil
Q&A:  Suzuki LT250 Vibration and Clutch Slip












Weeks Motorcycle Home

Website upgrade in progress




Ask a Repair Question



Search Our Site
Custom Search




ATV & MOTORSPORT TIEDOWNS


Vote for our site on Webbie World!



Weeks Cycle Salvage
eBay Store


Show Off Your Machine!

Show Off Your Machine




Weeks Gear
coming soon!



Sale Banner at Adventure



Discount OEM Parts






Classified Listings


Review weeksmotorcycle.com on alexa.com









Site Build It Affiliate Program