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I've been looking into buying a used 2stroker and I am seeing something common with most that are for sale. They are advertised as having a "new top end". Can anyone tell me the meaning of that and if it is worth my time to invest in a bike that has had it done? Anything else I should now when looking into a used 2stroke?
What kind of 2 stroker were you looking into buying?
A new top end consist of the following:
Piston
piston rings
wrist pin
wrist pin bearing
wrist pin circlips
new base gasket.
(the head gasket does not need to changed when doing a top end but it is wise to)
Be careful though!
Alot of people can say they did a top end, but ask them what they actually replaced.Also, ask for receipts for the recent top end they did replace.
some people consider doing a top end, replacing the rings
Alot of people replace everything except the wrist pin bearing. which is ok, but not if a couple top end jobs were performed.
A good thing to bring with you when you inspect a two stroke is a compression tester.
This will be able to tell you if the person is lying about the top end or not.
Usually 160-170 is what the compression tester should read on a new top end of a trx250r.
I think banshees are around 130- 140 psi per cylinder.(banshees need two compression testers at the same time to get a nice accurate reading) Though one will work.
I would also start the bike and run it through all the gears.
feel the clutch play. IS IT GOOD?
Make sure you let that 2 stroke warm up before you do any wide open runs. ALWAYS LET A 2 stroke to warm up!!!
I looked at a couple banshee's and 4 250r's ... even a couple of dirtbikes. but like i said, the majority of them have new top ends.
Thanks beerock for your insight!