Break In Only 25/miles on break in.......Mix 25:1 on 48cc slant head

Discussion in '2-Stroke Engines' started by geebt48cc, Feb 2, 2010.

  1. geebt48cc

    geebt48cc Member

    Hey there,

    Do you all think the motor will gain alittle more power after Mmmmm, say 400 miles? I weigh right at 250lbs, 6' 7" and had to go 48cc do to legal stuff.:confused:

    Goes fine on straights, but then.........Pedal time!!!!!!!!!!!!!!~ PS-I am breaking in!!!!!!!!!~

  2. arceeguy

    arceeguy Active Member

    I'd say these engines are pretty much broken in after a couple hundred miles, then its all downhill from there. lol
  3. srdavo

    srdavo Active Member


    48cc is just fine. What they may lack in power, they make up in durability. (IMHO)

    Be glad we have pedals & know how to use them. :D

    Yes.... in my experience, they all develop a little more power as they break in.
  4. arceeguy

    arceeguy Active Member

    Seriously though, a 48cc engine with 250lb rider will need some assist up hills with a 44T sprocket. A larger rear sprocket will help out a lot, at the expense of top speed of course.
    Last edited by a moderator: Feb 2, 2010
  5. Whizzerd

    Whizzerd Member

    What about a 1 tooth smaller front sprocket? Won't that give more "torque?" You guys in the know please comment. Thanks!
  6. srdavo

    srdavo Active Member

    hey geeb,
    here you say 25 hours on break in.... your other post says 25 miles.
    Big difference. ???????

    Whizzerd, Yes, a smaller front sprocket would work great, but as far as I know.... a HT 9 toother does not exist. ????

    rear sprockets...48 & 50 toothers are common. (& better for us heavy guys)
    Many custom sizes are available.

    I've owned & ridden both sizes & I prefer 48cc.
  7. give me vtec

    give me vtec Active Member

    I dont prefer either... they both suck.
  8. geebt48cc

    geebt48cc Member

    No, No, No, I meant 25/miles only of break in!!!!!!!!!!!!!!!!!!!!!!!!~

  9. arceeguy

    arceeguy Active Member

    Well, in that case you've got some more running time until the rings are fully seated, but I wouldn't count on a remarkable amount of extra power. Not enough to pull you up hills like you want. I would look into a 48T rear sprocket.
  10. retromike3

    retromike3 Member

    more power

    I would look into a tuned pipe. I got one from Sick Bike Parts and it changed the performance a whole bunch. One of the problems with the pipe was I used to have to pedal up the hills and now I don't. I have to ride my trainer inside now if I want to lose some weight.:grin5:

    Mike Frye-the bike guy
  11. give me vtec

    give me vtec Active Member

    yep... larger sprocket and a tuned pipe will be a much more effective way to get that power you need than wishful thinking.
  12. AussieSteve

    AussieSteve Active Member

    Another alternative, if you have gears, is a shift kit from Sick Bike Parts.

    ... Steve
  13. CaptJ

    CaptJ Member

    I would love to have a shift kit from SBP, I hear you could take off without
    pedaling using low gear. Then shift thru higher gears as needed.

    I wonder how many shift kits are sold here in Calif. the law says we can only have a single automatic drive? Do they "law" really know or care? :devilish:

    Have Fun!
    ... Jim
  14. AussieSteve

    AussieSteve Active Member

    Howdy, Jim. Here, the law doesn't seem to care. All of our bikes are illegal if they exceed 200W.
    I figure I'll keep riding until I'm told not to.
    (Almost ready to test my shift kit - only a modified front engine mount to go. I just need to pick up a bit of 8 gauge plate and cut it to shape.)

    ... Steve
  15. CaptJ

    CaptJ Member

    Hi Steve, I thinking I should PM SBP and ask them if they have any info on shift kits sold in Calif.
    (You said: our bikes are illegal if they exceed 200W.) Dont you have a 70cc? One electric and one gas and the shift kit is going on the gas?
    Good luck on your shift kit test, let me know how you like it.

    ... Jim
  16. AussieSteve

    AussieSteve Active Member

    Not a bad idea, either Paul, (Pablo), or Jim, (Ghost0), should be able to help with that. I guess it depends on how strict the laws/cops are in your area.

    Yeah, Jim, my electric is 200W and legal here, the 70cc 2-stroke isn't. Our law limits total power to 200W, with no mention of gears, speed, etc. That rules out all petrol, (gas), powered bikes. Mine was about 1.7kW, (2.3HP) stock, probably about 2.5-3HP now. That's 2kW @ 2.75HP, 10 times the legal limit.
    All the same, I've ridden past cops heaps of times without a problem.
    Once, they drove slowly in front of me, to match my speed, for a mile or so, then drove off.
    Another time, I rode through a 'Random Breath Testing' setup and the only reaction from the cops was a wink. I think it depends on how you ride, here at least. Age comes into it, too. The younger riders, ~16yo, seem to get hassled more.

    I've spent half the night making a new, adjustable front engine mount to suit the shift kit. It's getting there. Food and sleep now, then hopefully I'll get it finished tomorrow. It's looking good so far. I've used rubber and some nylon from an old cutting board to cushion the mount, sandwiched between two pieces of 1/8" steel.
    I still have to modify the exhaust mount to suit the higher engine position.
    All good fun - keeps me out of trouble.

    ... Steve
    Last edited: Feb 4, 2010
  17. Ghost0

    Ghost0 Guest

    We have sold many kits in California and to my knowledge no one has ever got a ticket due to having the ability to shift. A couple if things to consider is that you do not have to shift for the bike to function. If you leave it in about 4th gear it has the same gearing as the stock 44 tooth sprocket. So you would pedal from a start and engage the clutch and be off, so although you can, you don't have to. I would say that is "flexing" the rules but I think you get my point and as AussieSteve says, if you are riding responsibly they are much less likely to hassle you in the first place.
  18. CaptJ

    CaptJ Member

    Your custom fabrication makes sense I like it.
    Lol... trouble is my middle name.
    Keep away from your brewery! "Haha" :grin5:

    ... Jim
  19. CaptJ

    CaptJ Member

    Hey Jim, I was thinking about talking to you and here you are, and thank you.
    I have a Walmart 26" Schwinn Point Cruiser with SHIMANO 7 speed.
    I had a stroke 3 years ago so I'm a little numb on my right side, makes it tough to get pedaling.
    I would like to take off, starting out from a dead stop without pedaling then shift up to speed in traffic to stop light to stop light (20 MHP) short block.

    I'm runing a 48cc 2 stroke.
    ... Jim

    Attached Files:

    Last edited by a moderator: Dec 15, 2015
  20. geebt48cc

    geebt48cc Member

    Uno, I can't really get out and ride because of the major snow here in Va...........i'm going to keep on riding this big 48cc and see if she starts to break in alittle more. No, everything is working out great, but just hope that it gains just a bit more torque? Time will tell.......................................