easiest motor swap

[mcarthur12]

whats the easiest motor to swap into a g1 to get more power and speed

[slonomo]

Ok, so I see you have about 3 different threads going on this. Let me help you out a bit. Hopefully you check this thread.

The G1 engine is derived from an early Yamaha snowmobile design, quite possibly the Enticer 250 model, but this is not confirmed. There may have been an earlier version of this engine, but I haven't found one yet. This engine is a relatively low compression, low performance two stroke. The exhaust and intake are mostly what makes the engine very tame. Small carb, and the exhaust lacks an expansion chamber like you'd see on a dirt bike. This makes the G1 a quiet running, long lasting machine, designed to drive on golf courses. The ports on the engine are also undersized, which will limit it's power delivery and max power potential. To get this engine to run like a true two stroke with a good power to cc ratio like a dirt bike would be unrealistic. To get a good amount of power you'll have to change engines.

Some people have used the Bravo 250 engine, rated at 18 hp, because it can be modified to fit and to use the G1 ignition that enables it to run backwards for reverse.

Some have used the Enticer 250 engine because it is nearly identical. So close in fact, that the external parts of the engine car interchangeable, meaning, you can bolt the top end of the Enticer engine onto the bottom end of the G1. The crank stroke is the same, so you will get a true 250 cc engine and it "should" run like the Enticer did.

In either case, the key is in the carburetor and jetting, exhaust, and clutch. The G1 clutch is not able to be modified with bolt on parts to make it able to work in sync with the Enticer power delivery. So a new "adjustable" clutch will be needed. Also, the exhaust it a tricky endeavor, you'll likely have to fab one up, and it's tough to get it right with the expansion chamber position, etc.

I've had my Enticer 250 project going for a while now, and while I've made good strides, it is far from finished. I really hit a roadblock with the carb setup and clutch. But, it "WILL" be done soon. So, be sure you are in for the long haul with a project like this, because it's alot of trial and error, failures and successes.

Just know that it's not as easy as bolting a few parts in, changing the carb and you're good to go. It's going to take some dedication to get it right.

Here's my build thread

http://www.buggiesgonewild.com/big-b...0-project.html