best way to gear motor to wheel

[michaelr123]

quick question, are sprockets the same for #40, #41 and #42 chains? thats what it seems like from alot of websites

 

[Wheres my dog]

#42 chain as in 420 chain you mean???

To my knowledge... 40, 41, 410, and 415 are all the same pitch size... now all of these are different widths which may not seat well on larger toothed sized sprockets!

 

[Bugsy]

I am an absolute noobie here, in fact, this is only my second post, so don't take me to seriously.
My question is, why would you try to fit a chainsaw or weedwhacker motor to a bike when you can buy a complete kit with motor for only $125-$135? I suspect you will spend more than that trying to retrofit, plus have an inferior set-up when you are all finished.
I am pretty tight with a buck, but even I can see what a huge value these kits are. How in the world can they make a motor, add in the chain drive, and the hand controls for that cheap? And, the darn things work great!

 

[wbuttry]

I am an absolute noobie here, in fact, this is only my second post, so don't take me to seriously.
My question is, why would you try to fit a chainsaw or weedwhacker motor to a bike when you can buy a complete kit with motor for only $125-$135? I suspect you will spend more than that trying to retrofit, plus have an inferior set-up when you are all finished.
I am pretty tight with a buck, but even I can see what a huge value these kits are. How in the world can they make a motor, add in the chain drive, and the hand controls for that cheap? And, the darn things work great!

well it is like this people have to much bloody time on theyre hands and to darn much money to waste and people wanna see if they can improve on something that works good i gotta work for my money and sure the heck arent gonna blow it on something that wont work ........

 

[michaelr123]

hey quick question, are 40, 41 and 42 chains all the same? will they all fit the same sprocket? thats the idea im getting from some websites,

and problem with my clutch, the cup is on the inside, and the bolt faces out, if i can get a pic of it up, its a mcculloch pro mac 610 chainsaw, but the sprocket that takes the the chain of the saw is like sandwiched between the engine and the clutch cup i guess you'd call it? any suggestions on how to get something on the outside so i can weld a sprocket to it? im thinking like welding 3 pieces of metal to the outside of the cup and like bringing them around to the front and connecting them so i have something to attach the drive sprocket to, and thats running to a 72 tooth sprocket thats connected to 10 that will go to the cassette on the back, giving me a 24 something ratio thru like an 11 at highest, does that sound good?

and i guess how do you get pics on here?

 

[Wheres my dog]

I am sure you are aware of this already...

You do know that chainsaw engines are extremely loud?

 

[5-7HEAVEN]

well it is like this people have to much bloody time on theyre hands and to darn much money to waste and people wanna see if they can improve on something that works good i gotta work for my money and sure the heck arent gonna blow it on something that wont work ........

Not everyone uses cheap Chinese engines(HT, HS, HF clones) just because they're cheap. Some drive American (B&S), some ride Japanese because they're dependable(Tanaka, Mitsubishi).

I work for my $$. I improve on things that work well. I ride Japanese engines for speed, power and reliability.

 

[5-7HEAVEN]

hello everybody that has accomplished the awesome task of mounting an engine to a bike! i for one, am struggling! just a bit! I'm wondering how people are engaging their engine to the wheel.

i'm ruling out friction drives cause they suck, but of course drivetrains and gearing and such become a difficult, expensive hassle.

one of my biggest needs is WHERE DO YOU BUY GEARS???? i've looked all over and only found a few spotty places that sell a few gears, can anyone offer a suggestion as to were i can find spur gears for a drive train?

the reason for all the trouble is because i know about gear ratios already (won't bug anyone with that) but i've devised a plan with a drive train that takes a chain input from my 60cc chainsaw engine that happens to be working now after alot of hard work, through a drive train (basically input 20 revolutions output 1 rev. 20:1 in that sense) and then bike chain sprocket that is on a shaft connected to the last gear on the drive train, which will run a standard 420 bike chain to the tire, and hopefully will be close to the magic 1:20 ratio im looking for.

anyone have any comments on this idea? how did you do it?? basically i just need a pic of your drivetrain and the websites where you got your gears from, other wise i'm good to go, as far as i can find so far gears are really hard to come by without like buying in bulk from a manufacturer,

If you know about gears, you must know that the ratio you're proposing will end up burning up your clutch. You will also have to be rolling down a steep hill before your engine slightly assists your bike.

Shoot for 14.32:1 in high gear, 35:1 in first gear.

Your calculations have you at 7.92:1...

 

[spad4me]

This is what you are missing.
It is a five to one transmission. It is the first stage of the total reduction. Gear Box "POWER TAKE OFF" BOLTS UP TO THE
CLUTCH PACK SIDE OF THE TITAN MOTOR .
http://thatsdax.com/ENGINE_KIT_PARTS_PAGE_4.html
The output shaft has a ten tooth gear.
PTO 10T 1/2 inch DRIVE SPROCKET STEEL . Fits
Gear Box PTO and other gear boxes with 6 cog
spline. New Style one Piece milled. ONLY $11.99
PTO SPROCKET RETAINER CLIP SNAP RING.
KEEPS SPROCKET ON TO THE SPLINE
SHAFT OF THE PTO UNIT.
The ten tooth output shaft drives the front (48 to 56) chainring freewheel jackshaft setup which is directly bolted to a 24 tooth sprocket at the front chainring.
Instead of a front shifter I have two directly connected sprockets.
These are available from sick bike parts. They are parts of their shift kit.

My first gear is 39 to 1.
And the highest of the useful speeds on my rear shiftable cassette is about 17 to one.

I believe that 410 420 and BMX chains all have the same pitch. The side to side spacing of the end plates is different.
I use KMC 710 or Kmc 910 or whatever I can find cheaply locally. I have used all the local lowes supply of 420 chain.
I use a whipperman or equal multispeed chain of no more than seven speeds .
The size changes over eight speeds (too thin for me).

Here is a calculator that will help.
http://motoredbikes.com/showthread.php?t=18545

 

[5-7HEAVEN]

I don't think a 5:1 transmission will bolt onto his chainsaw engine.