what can you do to get the best out of your 2 stroke motor?

Discussion in 'General Questions' started by chevy383, May 9, 2015.

  1. chevy383

    chevy383 New Member

    I have a 2 stroke 80cc motor and I was wondering what are some cheap things to do to get the best performance out of it. Any suggestions for speed?

  2. Timbone

    Timbone Active Member

    My ideas:

    Run a oil mix of anywhere from 25:1 to 32:1.

    Get a good sparkplug: NGK B6HS does great.

    Use heavy duty motormounts to lock the motor down tight. Check your connections often!

    Make sure your exhaust is supported by more than just the two exhaust studs on the engine block.

    Chuck the stock air filter! You can rig a simple plastic/rubber enclosure around the intake that will let your motor breath and run steady at 6000 rpm.

    If you really want big top end speed, run a smaller rear sprocket. But not too small: 41 or 40 is probably best for city riding.

    Use flat resistant inner tubes for your tires.
  3. bluegoatwoods

    bluegoatwoods Well-Known Member

    Forgive me. For I'm going to give you just the opposite advice from what you really want.

    I might not have even given this answer. Since you don't need me to tell you not to do something that you want to do. But I'll go ahead and do it for the sake of others who might read this.

    Don't try to improve performance. Go slow. You'll live longer.

    And it's still a lot of fun.
  4. battery

    battery Member

    You can do a lot of research...
  5. Timbone

    Timbone Active Member

    I am with BGW. Everybody wants to know how fast these things go. The important thing to do is GO! Whether it cruises at 22mph or 29mph, that's not a big difference. Just get the thing running smoothly and reliably and every ride will be a blast.

    I read this on a motorcycle site: it a lot more fun to ride a slow bike fast than a fast bike slow! I agree and this certainly applies to motorbikes.
  6. butre

    butre Well-Known Member

    doing 50 miles per hour is all well and good but not a one of these engines will last very long like that. My suggestions would be to correct the transfers by putting little ramps on the top of the piston, polishing the exhaust port, balancing your crank, putting an aftermarket CDI on it, and putting a good quality expansion chamber on it (not a cheapo from ebay, you want something like a CR80 expansion chamber (not bolt on) or an arrow snake pipe (bolt on). Any crazier than that will kill your reliability

    and of course nothing will get you around a track faster than good brakes, so if you splurge anywhere make it there. it's good for both safety and lap times.
    Last edited: May 12, 2015
  7. chevy383

    chevy383 New Member

    I dont want 50mph I want more like 30-35
  8. jaguar

    jaguar Well-Known Member

    the cheapest mod is making your own intake extension for more down low power, that and using glass and sandpaper to plane your head and cylinder mating surfaces because otherwise you have compression loss and therefore power loss
  9. darwin

    darwin Well-Known Member

    Title of thread is [what can you do to get the best out of your 2 stroke motor?]. Answer is, grenade it while your 4 stroking on by!
  10. jaguar

    jaguar Well-Known Member

    yeah 4 strokes are more reliable but also less powerful and hard to modify for more power
  11. Transcendstime

    Transcendstime New Member

    A performace carb and filter (With throttle cable a lot dont work with the standard cable properly imo)
    Suprizingly they help you can get the set for around 30-40 $ or so on ebay

    Also shift kit helps I have only had one on one of my bikes it was nice but kinda over priced for what it does

    Exaust.. you can gain 1-3 mph from it but dont skimp ,, but a descent one (40 or so bucks)

    Last thing is Tune your existing or new performance carb properly.. (many you tube videos that can help if ya dont know how)

    FUEL MIXTURE... try different ratio's us (maybe a 1/4 gal and tweek from there using proper math) (i only say 1/4 cause thats easy to burn off and you can try more mixtures faster

    anyways hope that helps

    (This coming from a guy heading across the US for a second time so i kinda have some miles)

    ALSO not performance but get a 415 Chain.. prolly my best investment ever... little heavier but no more lossing chains after a few hundred miles