98 cr125 any tips appreciated

[tylerw2239]

Hey everyone,

just bought a used 98 cr125 for 800. Took a ride earlier and it's got a bunch of power. I'm not sure of the previous maintenance, so I want to do the top end for this summer, then this winter do another entire rebuild, then next spring I want to pull and redo all bearings.

The only part i'm nervous about is the bottom end. The cheapest crankcase splitter is from Tusk aruond 60$ and crankshaft puller to get the crankcases back together, another 60. I knwo of the freezing and heating method, but are there any other cheaper ways to do this without damaging anything? I was also thinking of buying motion-pros bearing remover set, http://motionpro.com/motorcycle/tool...g_remover_sets
Will that take care of all my bearing needs, like wheels, engine bearings?

Any tips at all about any part of the engine or bike would be appreciated.

[ltfirebreather]

if i were u id check compresion if it is good leave it b. if it starts 1st kick after sitting a week leave it b.why do a full rebuild and then take it back apart ot put bearings in it do it all at onced. good luck

[tylerw2239]

true it does read nicely on the compression, but for the future
im thinking about spending the exact same amount of money, but it would go to a 144 big bore from eric gorr. Does that sound reasonable? If so will I need to re-jet? What should I jet to?

thanks
-tyler

[4x4kingx889]

here are some vids of 2 stroke rebuilds http://youtube.com/user/RockyMountainATVMC

[tylerw2239]

after i ride this bike for a while and get it hot, when i shut it off smoke is still coming out of the muffler for like 5-10 minutes. heavy at first then it slows down a lot. its less than when its running, it basically looks like the smoke coming off of a lit cigarette. the tranny oil is really bad i need to change that, air filter is brutal. i'm repacking the silencer this weekend but it hasnt come yet.
-thanks