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Thread: 2stroke...New top end?

  1. #1

    2stroke...New top end?

    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?

  2. #2
    Join Date
    Oct 2001
    What kind of 2 stroker were you looking into buying?

    A new top end consist of the following:

    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!!!
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  3. #3
    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!

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