i recently removed my ignition cover to look for the source of a rather loud knocking sound in the engine. the flywheel weight (13oz steahly) was loose and came of with little resistance. the nut was apparently left off during the last bottom end rebuild. my question is, what damage could this have caused, if any, and would it have changed the ignition timing. should i just replace the nut and forget about it? i rode the bike about 5 hrs in this condition.
02 cr250 flywheel nut missing
- Thread starter mark89v
- Start date
you need to remove anything that was rattling and clean it and even a light rub with 800 grit wet and dry and reassemble it and then listen and hope the noises stay away. It could have damaged all parts that were rattling. The timing will only alter if the flywheel key has sheered off or the backing plate (with the wires and windings) has moved.
High Lord Gomer
Poked with Sticks
- Sep 26, 1999
- 11,790
- 34
Make sure the key is still in place.
- Mar 8, 2000
- 1,993
- 7
On many models the flywheel weight replaces the flywheel nut.
Put the stock rotor back on, no extra weight, please? There are more sound methods of detuning that bike. Trails, put a Forestry approved muffler may do! Dragging a boat anchor works too, but does hang up on trees! Not recommended!
- Thread starter
- #7
farmer john, you are correct sir! to expound on what ~wff-ruled~ said, these weights put unnecessary heft on a place where it wasn't really meant to be. hanging out there on the end of the crankshaft could potentially cause abnormal bearing wear. they also, because of the design, have a tendency to come loose. if you do run one,you really have to keep a close eye on it.
whenfoxforks-ruled said:
Strange... Almost all enduro models use much heavier stock flywheels than their MX counterparts. 'Splain me? I mean, I know the OEM's are retarded sometimes, but I don't really think this is one of those times. I do suppose some bolt on weight could not be properly balanced. Balancing the weighted flywheel would prolly be smart? I'm all for using one though, they really do work.
