The neighbor kid and I have ganged up to build the nastiest minibike in the known world......we're still collecting parts and here's the powerplant for it....834 cc's of screamin Yamaha snowmobile mill...supposed to put out 36 hp. HOOCHIE MAMA! I can't figure out how we're ever gonna use the stock expansion chambers in the teeny bike, so it's prolly gonna lose some performance with conventional style pipes. The clutch for the drive belt is interesting but bulky...not sure what to do there but I'll come up with something. It appears the sheaves of the drive pulley squeeze together as RPM increases, making for a higher gear due to less multiplication of the , now larger diameter of the pulley.. Still, it's a pretty big, bulky setup for a minibike. Has a pull-start but I'm not sure about the ignition system...didn't have much time tonight to take a good look. The piston's are rusted to the cyllinder walls..siezed up tight! I imagine we'l prolly need a bore job with new pistons. I can't imagine how expensive that's gonna be. any ideas? .........and we have the carbys [yes, there are 2 of 'em] soaking in Kroil oil to un-sieze them too....engine must have sat in a very damp enviornment for quite a while....
Yer clutch is referred to as a "salisbury", most commonly found in the Honda Odyssey of the early 80's. You'll need the matching driven pulley for it to work. If I remember right, the drive pulley contracts with rpms giving a larger effective diameter and the driven pulley is spring loaded to expand as the belt gets "shorter" to give a smaller effective diameter. Chris
Yeah, it works just like the Comet Torq-a-verters used on mini-bikes, just a little bigger. You could probably figure out a way to get one of these to mate up to that engine. Bitchin' by the way...
It's gonna be in a mini-chopper. I think I'll prolly have to strettttttttttchhhhhhhhhh the front out there just to keep the front wheel on the ground. Should be wild! I gotta find a German helmet, flake it and airbrush maltese crosses on it just for minibike cruises
you'll have me beat on hp, but i'll overcome it with cool. i have a 45 flathead from a cop trike. my only hurdle is designing a jackshaft so i can bolt up a starter to it. seen it done on one at the all harley drags, just have too many projects going on now to get it going. how the flywheel work for you?
HA! Silent Rick....my hero! At the risk of derialing my own post, I took the your pressure plate and my caddy disc in for relining and pressure-plate rebuilding. They'll be very happy together behind the ass kickin hemi in my 36 chevy pickup...should be assembling the whole mess very soon and thanks again for the flywheel and pressure plate...
That motor looks kinda wide,you'll probably need a real wide rear tire so the pulleys will line up.Or you'll need a jack shaft to offset the drive. [ QUOTE ] I can't figure out how we're ever gonna use the stock expansion chambers in the teeny bike, so it's prolly gonna lose some performance with conventional style pipes. [/ QUOTE ] You could cut down the stock expansion chambers,(never mind all the tuned length theory)and still get better performance than just running straight pipes.
Thanks, Unk.......as you can see, I'm totally clueless regarding this stuff. I have a nice fat cushman golf cart wheel and tyre. And I was planning on using a 20 inch bike wheel in front...
All the kids in my neck of the woods are into hotrod garden tractors. A friend just gave me a 350 twin Honda eng.,I'm gonna put that motor on a old Toro tractor frame and smoke the neighborhood. Chuck Fish
Rocky, Whats this enlisting a "PARTNER IN CRIME" in this latest venture. Is the neighbor kid the "SACRIFICIAL LAMB" for test pilot so you won't subject that war torn body of yours to the perils of working the bugs out of this new rocket ship. I think i'm on to you. Hows this for detective work: 1. Rocky tells neighbor kid he needs help with supersecret project. 2. Neighbor kid swallows story hook, line and sinker. 3. Rocky outlines plans for minature death trap but assures neighbor "I'll be behind you all the way" 4. Neighbor goes along visualizing his indespensible part in the plan. 5. Rocky revels in his leadership ability 6. Plan moves to construction 7. The build results in a 'DEATH BIKE" that no one in their right mind would ride. 8. Neighbor kid mounts "MISSILE" and sustains severe injuries, but nothing life threatening. 9. While kid recovers Rocky makes "ADJUSTMENTS" to origional design. 10. Recovered test pilot is convinced that "ALL SYSTEMS ARE GO" 11. Subsequent trials result in simular outcomes until the design is finally refined to a point of semicontrolled terror and our fearless test pilot is reduced to months of rehabiitation. 12. Rocky takes the final product to Bonneville where he is hailed as a pioneer for his visionary approach to "reinventing the wheel". 13. Rocky sells new design to General Motors to be used as a prototype of new transportation concept. 14. Rocky returns home the a tickertape parade. 14. Rocky takes neighbor kid out for a hot dog and rootbeer to thank him for his help. Did I miss anything? Frank
Rocky, You know you are starting a MINIBIKE arms race that is gonna end up with someone seriously maimed or killed... DEATH ROD MINI BIKES on the loose.... I wish I hadn't sold my GEO metro now. That engine an tranny woulda made one HELL of a minibike trike.... I still got a 2.3 ltr Ford in my parts storage tho......hmmmmmm...... JT.
Frank...ya missed #15. Rocky makes kid pick up the check for hotdog and rootbeer with his first disability payment.
<font color="purple"> With a mill that big how can it be called a mini bike? Most of my past motorcycles were smaller than that. (CB350, SX400, C70, CM91, .....) </font>
All and all I believe the whole theory of the rocky/neibor kid build up except the root beer would have to be DRPEPPER. Got my 700x12 gocart slick and wheel/hub today for mine. lookin at 16 horse honda overhead valve engine.
rocky, you definitely want to keep the expansion chambers, if you can... a two stroke motor without them will struggle to match the power of a four stroke of equal capacity... and a two stroke WITH them will nearly make the power of a four stroke DOUBLE the size! of course, you might have too MUCH motor if you keep 'em...
HAHAHAHAhahahaha...you fuckin guys kill me! Actually, I axed the kid how much he wanted for his snowmobile engine and 'splained to him what my plans were for it. He told me he's give it to me if it could be a "neighbor/neighbor" project. He's 17 now and loves hangin at my garage, helping me with my hot rod junk. He's the kid I sold my fiero to...has the head off it and is getting a valve job done on it. His first repair job. I hope he lives through the bike's "maiden voyage"...maybe I should take out a policy on him, eh?
A good friend of mine built a minibike in highschool shop class. It was powered by a suzuki x6 hustler motor. Stock two stroke twin with a six speed. 30 horsepower and 150 pounds. Absolute insanity to ride. He actually built a telescopic front end and swing arm rear...painted it candy green and put the suzuki tags and plate on it. He rode it on the street till the tickets added up to license suspension. We took it to the drags and they let us do by runs, but not against anyone else...said it was too dangerous. I picked up an x6 this summer at an auction and now I'm thinkin...hmmmm....could history repeat itself??? If you finish the bike, be very careful when that two stroke gets on the pipe....no beer and a monster grip on the handlebars...have fun
[ QUOTE ] All the kids in my neck of the woods are into hotrod garden tractors. A friend just gave me a 350 twin Honda eng.,I'm gonna put that motor on a old Toro tractor frame and smoke the neighborhood. Chuck Fish [/ QUOTE ] Chuck - same down here, we were going to have our first offical "race" tomorrow but a little Tropical Storm post-poned it. My step sons 18hp Craftsman clocked at 42 mph last weekend going down the road . Later B Rocky - I might recomend the Coment set up, fairly cheap and you can use a regular pulley on the rear or jack-shaft. I got a front end off of a moped that i plan on using for mine (shocks & brakes)
I wish I could remember the times, but we were having so much fun, it wasn't important at the time....Never got a picture of it either and nobody seems to know where the bike ended up. I have never been on (or in) anything that acted like that minibike....way too scary for a sane human being. You might think about leaving one plug wire off that thing!!!!
Dang! I'm gonna need more than a Sneaky Pete system for the Blue Bitch! Nice knowing ya Rocky...remember us in your Will!
i purposely have skipped the minibike posts because i really was thinking you guys were talking about minibikes, not atom bombs on two wheels... no you are talkin fun.... anyway i saw what i think must be one of these machines a while back.. looked like a mini chopper with a golf cart tire on the back ,, and a motorcycle wheel and fork on the front,, looked fun as hell,, had a rope start honda 9 or 10 hp motor... i want to build one with a china diesel i have,, about 8 hp or so.. blows black smoke when you accellerate it and vibrates real good,,, should get awesome mileage and it will run on wesson oil too...smells like popcorn. should be funnier than hell bob
<font color="red">Shit Kmembers Bro has a 10 or 12 hp from a generator.....can't wait until he gets that rollin...he only weighs like a buck 35..... R E D M E A T </font>
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