What did you do to your motorized bike today?

Discussion in 'General Questions' started by MotorBicycleRacing, May 20, 2013.

  1. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

    What did you do to your motorized bike today? :cool2:

    I will start this fun thread off! :yes:

    I played around with my new, old 50 cc Huasheng that has
    the 5/8" shaft turned down to take bearings to replace
    the oilite bushing on a Grubee 4G trans.

    I found a better filler that bolts on the end of the 5/8"
    shaft to support the last of the 6 micro bearings that go
    in the clutch bell.

    I bought the 4 stroker from my buddy MotoMagz who has
    upgraded his bike to a 97 cc Lifan.

    I still need to buy the clutch to get it going. I am pretty sure
    that Bicycle-Engines is the only place that you can buy one from?

    I will take some pics tomorrow to show how it works.

    So, what did you do to your motorized bike today?
    5-7HEAVEN likes this.

  2. 5-7HEAVEN

    5-7HEAVEN Member

    Thanks for starting this thread. The other forum started this same topic years ago, and has over 130 pages.

    I fiddled around with my new bare frame build and center-mounted 4.5hp CY460 radio-control engine. I tried two frames and was unable to mount the engines and clear the pedals on either frame. I guess I'll have to mount them ala Scooterguy style, which is above the frame's triangle. Ordering SBP bottom bracket and BB frame adaptors tonight.

    I ride my bike to work tomorrow, so I'll do a checkup and lube the chains.
    MotorBicycleRacing likes this.
  3. HeadSmess

    HeadSmess Well-Known Member

    tried rebuilding a 66 that i siezed years ago and left in the frame, out in the rain for that time :)

    i ordered a 48, so i was sent the wrong motor. after it siezed i shrugged and ordered a cylinder n stuff for the 48 i had. different vendor, and what? i was sent the 66 cylinder. grrr! so i left it sitting and got a new 48 thats still going strong after 5000+

    today i decided to join 66 cylinder to 66 case and get it going.

    well, its a different piston to the original.

    so its reverted back to being a POS thats now on the scrap heap :D

    otherwise, the other 3 are going good :)
  4. rahul.kapoor

    rahul.kapoor New Member

    work day

    nothing as much special let see what happn today
  5. Fabian

    Fabian Well-Known Member

    Maybe a thread needs to be started that is titled: how many really, really bad words have you used when your bike didn't work properly or simply refused to work at all.
  6. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

    Yes, I stole the idea from there because I am banned over there right now.
    It says Member under name over there but it really should say Banned
    and you will notice that my signature has been removed.

    5-7HEAVEN, you have been a member here since June 2007.
    I have been here since July 2008 and I remember how this
    was the best forum before it lost a lot of members due to
    some bad decisions by the previous owners and mods.

    Anyway back to the topic which is what did you do to your
    motorized bicycle today?

    I am going to work on my 50cc GXH Honda race bike which will
    not have a centrifugal clutch like all the other 50 cc 4 stroke bikes.

    I am going to use my EZ Motorbike silent drive trans on it which
    works by slipping a 3/8" V belt around the front 2" pulley so I
    will have a real manual "slippable" clutch with a clutch lever.

    That real clutch also means that I can bump start the bike just like
    the 2 strokes.
    5-7HEAVEN likes this.
  7. Fabian

    Fabian Well-Known Member

    It's an exclusive club for those banned from the other forum, but i take the level of professionalism one step further by being banned for 5 reincarnations !!!

    Lots of people have had their ban be effective in the 3rd dimension but i've had my ban extended into the 4th dimension; 5 times over !!!
  8. darwin

    darwin Well-Known Member

    Well here's how the last few days have went. Decided to get the Honda 35cc going from sitting for the winter. Aired up the tires, lubed what needed it, then tried to fire it up. Well it fired up but won't idle plus no power. I'm thinking piece of trash must be in the carb so I take it apart and clean it the best I can, put it back together and same thing. Repeated that about 5 times and no luck, pretty ****ed about now so I order a new knockoff carb for $25 including shipping. So that bikes gotta sit till part comes in. Figure with the old carb I'll have some parts if needed. Still can't figure what went wrong but the thing is like a swiss watch with the springs and needle so maybe I bent something just not right....................I'm itching to ride and there sits my other bike and I figure I'll get that sucker going. Get the bike all ready and the Honda 50 fires right up and I'm smiling. Suns shining and its 80deg outside, life is good. Well about 20 miles into my ride, BOOOM POP! Back tire blows out, cheapass OEM tire that came with the bike when new. Tread was good, it separated in between the tread. At the same time I find out my freewheel is shot, coincidence I believe. Anyways you ever try to push a bike when the tire won't stay on the rim? Very difficult to do, so I call the wife to pick me up in the truck. Don't know how but in 5 days that carb came from China to my mailbox and I'm happy it did. Put it on immediately and the Honda 35 fired right up and runs like new, other bike sits till I get it fixed, tomorrow i'm riding..........Darwin's spring woes..............good reason to have 2 bikes instead of one.
    Last edited: May 20, 2013
  9. darwin

    darwin Well-Known Member

    Yea other forum has banned me till MABs are legal in all 50 states.
  10. 5-7HEAVEN

    5-7HEAVEN Member

    I thank you again for creating this post here. It is the BEST question to ask any MBer who rides frequently. I try to play nicely, but as in life, we're bound to have disagreements, especially if words are taken out of context. No politics for me at any forum. We all love our bikes and share our experiences w/other MB lovers.

    That said, I drove to the Chevron station to buy .75 gallon of gas. Oil in the can sloshed to a 100:1 mix. Once home, I fueled my bike and took off for work. I must confess I'd been previously gassing up @ the pump. On two occasions, I REALLY messed up at the pump, and the bike could barely run. So I'm back to mixing fuel the correct way, in the can, sloshed and shaken, then added to fuel tank. My bike performed very well to and from work. I just LOVE passing bumper-to-bumper traffic! :)

    darwin, I'm glad you fixed your bike and are riding.:)
  11. jaguar

    jaguar Well-Known Member

    great idea to start this thread. It will be imortal!

    I am trying out a new modification for the transfer ports. Good thing I was into plastic model building when a kid. Implementing this mod takes skill and patience.
  12. tom-fishing

    tom-fishing Member

    Rode to the store and post office, then beat the rain back home. :grin5:
  13. darwin

    darwin Well-Known Member

    Rode today 30 miles, local news said 59deg and I wore a tshirt and a hoodie. I was freezing. It was fun but it wasburrrrrrrrrr.............. Was thinking about all that I have involving MABs. COME TO THE CONCLUSION only a honda50 with chain/fd staton will make me content. My day............yours?
  14. jaguar

    jaguar Well-Known Member

    the topic is "what did you DO to your motorized bike today?"
    not what did you think about doing, or how did your day go today?
  15. 5-7HEAVEN

    5-7HEAVEN Member

    I commuted to work again, 12-mile round trip. Engine running fine, no breakdowns lately. Chain jumping and chain breaking no longer a problem. For years, I've also had brutal shift changes even while slow shifting. The bike wants to slide you off the seat on the first shift, even tho starting off in Second gear (38.18:1). The gears I used were Second, Fourth (28.64:1) and Seventh (17.73:1). Now I shift from Second to Fifth (24.55:1) to Seventh. No more sliding off the seat, nice gear spread and smooth shifting!
    Last edited: May 22, 2013
  16. jaguar

    jaguar Well-Known Member

    I tested my transfer port modification and it did have better low rpm power. Next I will put another piston in which doesnt have the transfer and exhaust ramps and see how much more low end power I can get with lessened port open durations. These 48cc engines need all the help they can get!
  17. Fabian

    Fabian Well-Known Member

    I'm really keen to see the results of this experiment!
  18. jaguar

    jaguar Well-Known Member

    Fabian, as you probably know the 48cc is so weak that its hard to notice any change that is not more than 10%. When I lived at high altitude I had the advantage of long slightly inclined streets that I could use to gauge results by top speed. Now I live in a coastal town that is purely flat which makes it hard.
    Anyway lowering the exhaust/transfer port durations resulted in just enough of grunt-from-a-stop to make this engine liveable in the city. Otherwise, throw it in the trash and upgrade to a 55cc or 60cc. I lowered the durations by replacing the piston with exhaust and transfer ramps to one without. That probably lowered my peak speed but I couldn't tell just by riding it. I had taken off the speedometer previously. This engine is so weak from a stop that improving it in that area should be the top priority. This engine has an extended intake track, 14mm Dellorto carb with extra holes in the fuel column, two types of modifications to the transfers for fully correcting the direction of intake charge, stuffed crankcase (which is a mistake with this small engine since it causes more of an emphasis on top rpm power), standard exhaust pipe with a 5" longer header welded in, Jaguar CDI, and uses synthetic oil. The final intake port duration is the ideal 120 degrees. Main jet in the Dellorto is drilled to .63mm.

    Port durations were changed from exh/trans/intake 143/108/124 to 139/100/120.
  19. 5-7HEAVEN

    5-7HEAVEN Member

    It was another great ride to work. However, the pullstring jammed as I prepared to leave my workplace. Removing the pullstart to repair it, you can imagine what happened.....BOING! The clockspring popped out. Reassembling the pullstart was an exercise in futility for me. Luckily, my family happened to be a few blocks away. I secured my MB onto the bikerack and went home with them. Fortunately, I have a spare 47R in storage. The next morning, I visited my storage locker, retrieved the pullstart, then my wife dropped me off @ work. At day's end, I installed the spare pullstart and enjoyed another great ride home.
  20. darwin

    darwin Well-Known Member

    Jaguar thinking he's running things. = When you think your Anton or any one else qualified jag you speak up, then you'll have the right to say what I say or not. Got THAT JAGUAR?.....DARWIN.