safety check before riding

[Chainlube]

I need a 40 chain to go round the clutch

How fat is that clutch sprocket? I've built lots of go-cart type machines and all I ever used was 41. 40 is the same as 41 but wider, and can move in and out on the wheel sprocket and cause interference with the chain stays.

 

[Toby woodman]

The teeth on the clutch are over 6mm wide I need 40 chain to go round the clutch and to the first jackshaft sprocket only, the main chain is 415

 

[GW's Motorized]

If you fire up the engine and idle it up to where the clutch engages you can use a grinder and make the teeth thinner. I've done this before, I wouldn't recommend it though

 

[Toby woodman]

the sprocket on the outside of the jackshaft is quite thick, 415 just barely fits on it, is there a problem with using a wider chain than designed for?

 

[GW's Motorized]

the sprocket on the outside of the jackshaft is quite thick, 415 just barely fits on it, is there a problem with using a wider chain than designed for?

If you do chain alignment is crucial. Having two large a chain can cause it to essentially "fall off" by folding off the teeth

 

[JuraTyKokotko]

Okay, I have finished my Honda gx160 bike, I'm just waiting for a wider chain to fit the clutch (can you use #40 chain on a 415 sprocket, bearing in mind that the 415 sprocket is a machined one, which is slightly wider than the stock 44 tooth sprocket). I'm just looking for someone to look over some pictures before I go for a ride, I'm worried it could be slightly dangerous and would like someone more experienced to look out for anything obvious that could be a problem or suggest any advice before I ride it. Thanks

That exhaust is balls grill literally,.

 

[Toby woodman]

If you do chain alignment is crucial. Having two large a chain can cause it to essentially "fall off" by folding off the teeth

the chain will be tight with a chain tensioner, the chain alignment is pretty good as I spent a long time getting it good when I bolted the motor down. with a tight chain and good alignment, would it be alright?

 

[GW's Motorized]

the chain will be tight with a chain tensioner, the chain alignment is pretty good as I spent a long time getting it good when I bolted the motor down. with a tight chain and good alignment, would it be alright?

It should be just fine then. My go kart has a very thin axle sprocket, and if my chain alignment isn't perfect it will come off constantly with 40 chain

 

[Toby woodman]

It should be just fine then. My go kart has a very thin axle sprocket, and if my chain alignment isn't perfect it will come off constantly with 40 chain

okay, is there a way to check for cracks in the frame, with such a powerful engine, even with the gearing only allowing the bike to do 25 WOT
how could I check for cracks

 

[GW's Motorized]

There are some ways, but I don't have any experience