Im thinking of a centrifugal clutch, just so its a little easier to ride. In saying that if i dont have enough room for it in the rear triangle i will save it for another project, and go back to the jockey shift hand clutch on the primary drive.
I dunno man, i hope so - but they sure do make one racket when you open them up!Surely these motors rev harder then 3000rpm, dont you think?
Cool, i look forward to seeing what you come up with. Its good to see people use these motors because they look so nice. Theres a few people on here using this motor : CamNZ, Fasteddy and Silverbear.pretty awesome bike. I also have an atco reel mower with that villiers motor I plan on putting in a bike, as soon as I am finished the 2 grubee projects I have and the mystery (to me) friction drive motor.
Has any one used a us820 motor in a bike?
I hope so too!!!!!!!I dunno man, i hope so - but they sure do make one racket when you open them up!
Yeah, and its not the easiest of decisions either..
Cheers, Cam.
The squeeze type belt clutches don't have to be used with their jackshaft counterparts, but you lose the variable ratio benifit. One of the main things you gain is the belt doesn't have tension until the pulley comes together and drives it. The comet driver is just the motor half of their cvt system. You can make a jackshaft that swings with a spring to pull back on it utilizing the variable ratio of the driver clutch.Thanks msrfan. Im a little confused as to which way to go. Decisions, decisions!!!!!
The clutch you are describing sounds like a CVT, is that right?....... I hadnt heard of the Comet Driver Clutch. Is it a cvt or standard centrifical clutch?
Cool, i look forward to seeing what you come up with. Its good to see people use these motors because they look so nice. Theres a few people on here using this motor : CamNZ, Fasteddy and Silverbear.
Whats a US820 motor?
Its a kart engine now but I think Chrysler developed it as an outboard motor. it has been used for everything. I have one out of my 1970 rokon trailbreaker. They are 134cc. the carb can be mounted in 3 different locations
I cant fit one of these to my engines crank as it has an unusual thread on it.The squeeze type belt clutches don't have to be used with their jackshaft counterparts, but you lose the variable ratio benifit. One of the main things you gain is the belt doesn't have tension until the pulley comes together and drives it. The comet driver is just the motor half of their cvt system. You can make a jackshaft that swings with a spring to pull back on it utilizing the variable ratio of the driver clutch.
TORQUE CONVERTER DRIVER COMET GO KART MINI BIKE CLUTCH | eBayComet 30 TAV2 GoKart Torque Converter Belt Drive Clutch | eBay
Yeah i commented on your thread, very cool. Like i said the "powerbee" sounds like a musclecar. I think it would be cool to build a Chrysler Powerebee musclecar inspired build. With racing stripes and "powerbee" retro decalsCool, i look forward to seeing what you come up with. Its good to see people use these motors because they look so nice. Theres a few people on here using this motor : CamNZ, Fasteddy and Silverbear.
Whats a US820 motor?
Its a kart engine now but I think Chrysler developed it as an outboard motor. it has been used for everything. I have one out of my 1970 rokon trailbreaker. They are 134cc. the carb can be mounted in 3 different locations
From Measure Twice.I cant fit one of these to my engines crank as it has an unusual thread on it.
And i presume it does not work properly when placed on the rear of the primary drive?
Also wondering how this engages? Is it like a centrifugal clutch where if it isnt engaging at the right rpm's i will need to play with it to get it working.
Im beginning to think my original hand jockey shift clutch that tensions the primary drive would be a lot easier??????
Exactly right about your original idea being the easiest to make. The other ideas are better suited to higher hp, higher rpm motors. You can experiment with different ratios until you find what pulls well and gets the best top speed. If you could borrow an inductive hand held tachometer to check your top rpms, you will have a little better sense of what to expect. Just remember when you pass the recommended power band, it may not pull faster except on flat ground. That's the beauty of variable clutches. You gear it to have plenty of take off power and gradually build speed with the clutch actuating according to demand and available power. You're right about using one on the jackshaft. Unless your 1:1 primary drive ratio, there may not be enough rpms at the clutch to engage. The exceptions are Whizzer clutches that are double pulley and engage at lower rpms. They are also one way for pedal or push starting. That's where a compression release comes in. The other example is an axle clutch like used on karts. As the name implies, they mount on the axle and are weighted to engage at lower speeds. I think they are a bit clunky for limited space applications. The Comet type drivers have spring retained weights inside the bell shaped housing that expand with rpms and force the pulley halves together. I think there's different springs and weights available. Most are made to fit straight keyed shafts like 5/8'', 3/4'' and 1''. I think you could utilize one on a pivoting jackshaft geared 1:1 from it to the motor. Sounds complicated but really very simple. I've done a similar build with this system. The bike in the photo uses a swinging or pivoting center mounted jackshaft and acts as a transmission. As rpms increase, the clutch squeezes together and pulls both belts simultaneously as the primary climbs to the outer edge of the clutch for top speed. Obviously mine has the clutch on the motor, but it could be reversed and mounted on the jackshaft for the same results. Don't be alarmed at the size of my clutch. It's much larger than most comet drivers. That's a whole different story. Anyway, it all depends on how much engineering and time you want to put into it. Also you're going for a certain look, so some components may not fit your overall idea. There's a lot more available, I just wanted to share what I'm familiar with. Either way, you have a great looking motorbike.I cant fit one of these to my engines crank as it has an unusual thread on it.
And i presume it does not work properly when placed on the rear of the primary drive?
Also wondering how this engages? Is it like a centrifugal clutch where if it isnt engaging at the right rpm's i will need to play with it to get it working.
Im beginning to think my original hand jockey shift clutch that tensions the primary drive would be a lot easier??????