Question about Mongoose Cycling
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Posted on Jan 02, 2017
Good news > save your money on the clutch. Bad news > Invest it in new shift forks. What you describe is a standard symptom of bent shift forks. Sorry to be the one to tell you this.
Posted on Apr 11, 2009
SOURCE: clutch not engageing
Start by changing the gearbox oil and the filter. Ride for 50 miles or so then change the oil again but w/o a new filter this time. Doing this will flush the dirt and grit from the gearbox. Use 10 w40 Pennzoil, Mobil, Shell or any other major brand.
The clutch is not fully dis-engaging. That is what is causing the shifting problems. Hopefully a shift fork has not been bent in your efforts to shift gears. The cost of 6 or 7 quarts of oil and an oil filter is nothing next to the cost for replacing bent shift forks.
Please rate this solution. Thanks Coty!
Posted on Apr 17, 2009
im certain that model has a 3 piece crank set up. the inner crank bearing jam nut has loosened up or the bearings themselves have gone bad.first check to see if its tight, if it is then it will require a replacement set of bearing that are a pretty standard size to all bikes and can be purchased at nearly every bike shop.
Posted on Jul 09, 2009
could be few probs, carbon build up on piston crown try a good cleaner fuel additive, your exaust is leaking or blowing allowing air to be sucked back in on revdown as well as you could have a inlet fault overfueling leaving to much unburnt fuel to enter your exaust, might be simple fix by just replacing the air filter and checking for burn marks around the air intake.
Posted on Jul 10, 2009
Look for the manufacturers name and model number on the gripshift and check at www.parktool.com. Look under derailleurs for repair tips which will give you an idea how they work. A twelve speed has six gears on the rear sprocket and two on the crank giving you a combination of twelve speeds. sheldonbrown.com is another good site with good articles and pictures.
Posted on Jul 17, 2009
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