Recent content by kheper

Here's an interesting engine. I can't tell from the image how wide it is, but a minibike frame may be able to accommodate it. 318cc Rotax Ski Doo Snowmobile Engine Clutch Carb Recoil Has Spark 130 Comp | eBay

3-5K ohm is the range of a functional coil. Your coil is not far off. I'd attach it to the engine then set the gap to .010" - between the conductors of the coil and the flywheel. If the engine fails to start, shoot for .005". If there is rust on the conductors, sand it of.

Before you purchase a coil, test the old one with a dvm. https://www.youtube.com/watch?v=mwJtAgtlggk

Check if the engine one of the 2 models in the links below? http://www.briggsandstratton.com/~/media/Frequently%20Asked%20Questions/Engine/PDFs/Antique%20Manuals/Antique%20Manuals%20FAQ%203/270361-domestic.pdf http://www.m-and-d.com/pdfs/briggs/132900-ms8487-0394.pdf

Here's a 407cc engine (make unknown) on a DB. The guy made a new motor mount for it: https://www.youtube.com/watch?v=4TldCiCZnko .

When you add an expansion chamber, opening up the needle valve (1/8-1/4 turn) or replacing the fuel jets with a size or 2 larger will increase the top-end. (I can't tell from the pic if the carb has a needle valve.)

If you mean the Tecumseh H50, here's an auction for a carb: $8.50 + $3.99/sh. Only 2 hours left though. New Carburetor for Tecumseh Troy Bilt Horse Tillers 5HP 6hp H50 H60 HH60 632230 | eBay

US Motorpower 820 (8HP) = $675 US820 Engines Lawn Boy engines (4-6.5 HP) can be found for a relatively low price < $100 on ebay. If you look locally, you may be able to find one for free (or a giveaway price). The PTO needs to be modded for service in a minibike - however.

How Two-Stroke Expansion Chambers Work, and Why You Should Care. With 2 strokes, an expansion chamber will produce better performance than a straight pipe. The simplest design is to weld 2 funnels together, cut down the spouts of the funnels then weld them to the pipe. The problem with...

R Tek Engine for Toro CCR2450 CCR3650 Powerclear Lawnboy Insight | eBay This the only 2 stroke that I know of which B&S made. It was produced for a Toro snow-thrower. The engine appears to be ~5HP with a 3/4" keyed shaft. Might make a nice power-plant for a mini-bike. The ebay listing does...

Here's a video of a race between a mini with a 212 predator and one with a 420 (13HP) predator. The 420 smoked the 212. If you're aiming for > 10HP, the 420 may be a better bet (in terms of cost for parts - which may not be easily sourceable) than the 301...

Here's a video of the Clinton 3100, powering a generator: https://www.youtube.com/watch?v=L4kH58mF5xA

The seat, the frame and the wheels resemble the Taco 22, but the forks definitely do not.

The ad states: "Tires: 4.10/3.50 x 5" "Tires" implies that both the front and rear wheels are the same size. The original hubs are white, the original engine is 3.5 HP, and the mini-bike is called a Drover - not Dover. Google for the thread on this site and links to pics on others.

According to an image in a thread on this site (to which I'm disallowed to link), the bike has a tire/wheel size of: 4.10 - 3.50 - 5 Surplus center sells hub/tire combinations, which can be co-opted for mini bike use - for relatively cheap. This will be my last post on this site. No link...