gearing

What gearing set-up do you drag racing mini biker's use for the 1/8 mile? I'll be changing my complete drive train pretty soon so what I have now doesn't really matter. I'll be running a built gx160 reving to around 7,000rpm(I hope) any advice will be helpful. thanks Sj

Anyone have any recommendation on the jackshaft gearing for an average speed and torque. I am running a 12T clutch and 72T rear sprocket. I am running a 6" Astro wheel with standard tires. I am not looking for speed but an overall ride.

Here are some instructions I put together to calculate your bike's gearing. Everybody wants to know top speed so that's in there. What this includes that the "top speed calculators" don't is how much torque is actually put to the ground. That's the power that gets you moving. That's what gets...

HI just wanting some info on gearing for my bonanza setup. hh60 with 12t clutch to 16 tooth then 13t to 60 rear sprocket. 530 X 450 X 6 tires. I ride pavement and flat land mostly. It does good but could you recommend anything better.

So on our two mini bikes will both be using modded 6.5 clones. We do not know what size gearing to run front or rear. Please help. We want mostly acceleration over top speed. maybe a in between. 1. My mini bike (tire size 4.0-10) 10" wheels on a arco frame w/ scooter tires...

My one build I'm going to run a Tav2 to a jackshaft due to the offset of the rear sprocket to the engine.... I want to run around 5:1 to 5.3:1 final gear ratio..... The question is how do I factor in the overdrive from the tav? I have an 11 tooth on the tav and a 65 on the wheel with a...

Ok first timer on the site. I just hopped a predator 212cc. Milled head to the max I think .65 or something. Flat top piston. Arc rod. Biggest cam they make. 32 mm intake valve. Tilley carb on methanol. Billet flywheel. Were riding on a dirt oval we made at our house about a 1/8 mile maybe...

I'm getting ready to start on a drag bike that will use a 11hp big block clone. I have access to a 1" comet TAV (thanks Jason :thumbsup: ). I have been using the various gearing calculators to figure out my gearing, but throwing the TAV in the mix has me lost. I've read that they have a 10%...

Hey guys, this is my first post here. I've been wrenching on vintage motorcycles all my life but I've never delved too deeply into minibikes. A few weeks ago at the AMCA meet in Wauseon, OH I picked up a really nice, complete rolling chassis for a '81 Suzuki RM80 (2-stroke motocrosser). It's...

I'm trying to narrow down my choices on gearing a bike. I can't afford to buy 10 sprockets to test. Hopefully only one or two.. Lets say a good running 6 horse engine that will only be turned to, say 5K. I'm going to run a 30 series clutch set up on my jackshaft, then I need my output sprocket...

I am puting together a 1300 and need size of gears to use. the jackshaft is gone and I want to replace everything from the clutch to rear sprocket. (like evil ed did at windber.)

I just installed a new drum and 15 tooth pinion on my clutch ,,,16 inch tires and 72 tooth rear sprocket . In case anyone needs the info....13 tooth and up clutch gear requires a 13 tooth and up drum from Max-Torque....The basic 12 tooth drum will NOT fit the 13 and up sprockets they sell...

I have the original 60-tooth sprocket. It's in serviceable shape, but showing its age: the teeth are sharpened and the grooves are lopsided. The bore is about 1 3/4". I think that's uncommon. The three, 3/8" bolt holes are about 2 3/4" apart. Three holes is also uncommon I think...

PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! HI EVERYONE I GOT ANOTHER PROBLEM MY CLUTCH IS SHOT!!!! All i have is another clutch that is 10t chain drive, well the only other gears i have for my jackshaft would be 12t in 12t out, 60t final axle. well that didnt works so well gearing must...

Current setup is a DB30 old style, engine mods include gov out, performance air and exhaust. Gearing is a Max Torque 12T and sprocket adapter 58T. Tire size is 15” diameter with stock 5.00 wheel. My dad says I don’t need a jack shaft for two reasons: 50 MPH is enough speed for a bike built...

So I have this Herters sitting here. I wish I'd have been able to look it over better before buying it but am still WELL happy with it.. First drive problem is the outer rear tav sheeve. Theres a spot (melted?? :blink:) into it.. It looks like someone got it with a cutting torch or something...

I've been throwing some numbers together to get a better idea of gearing combinations. I'm interested in low geared off-road type bikes but I'd like to have a decent top speed too. It's good to see the numbers for comparisons. The DB-30 is a bike I have and this combination is fine for driving...

I have pulled my Taco 44 project from the bowels of the garage and am determined to get back on the road. The PO had turned it into a "direct drive", bypassed the jackshaft. I have a 3hp, B&S IC for it. Target rider is a 10 year old. The jackshaft on it now is pretty beat up and there is only...

A couple days ago I took my Keystone mini bike for a test ride. It has 12 diameter wheels, 6.5hp clone, with a 11 tooth clutch and 54 tooth rear sprocket. This combo knocked me on my ass and doesn't allow me to exceed 20mph because then the front starts to lift. I was thinking that I would...

I have a alsport trisport with a hacked in 340 that after a few hours of work runs horribly.. So I spent the day with the plasma cutting and grinding off all the junk that was poorly welded on to the frame to make that engine fit and now I am down to the jackshaft and motor plate. I have a...