Recent content by Pyrotechnic

I would go with the Lifan 125CC manual trans. I love being able to use the clutch and shift my own gears. Even if you wear out the clutch it's easy and not too expensive to install new frictions. As far as power, right off the bat these rev MUCH higher than a clone ever will. I converted the...

Just wondering, what did you find wrong with the motor and are you sure it was the oil? I've seen cases where people take a motor that had been run on standard gas engine motor oil for a long time, and some sludge had built up. They then switch to diesel engine oil and the high detergent...

It seems I learn a little bit after every ride so I'll post it here. This is going to be really long but I just want to get all my thoughts out about the whole situation. When I was getting the bike to leave work, I warmed it up and as it was idling I opened up the main mixture screw to richer...

It's always had the feathering problem, even when the carb was freshly rebuilt with a new diaphragm and the motor was stock. Runs great at a constant speed though. Another data point about the temperature sensitivity. Today before my ride home from work I tried something new. I primed the carb...

Here's some pics. The fuel filter has since been removed, I found out real quick that you can't use one, or at least an automotive one with a diaphragm carb since it messes up the pressure differential just enough to make it run weird. The long tube header and the tunnel ram intake gave the...

The thing is, by turning the main mixture screw out I can make it run so rich that it runs terrible. Once I get the main mixture screw set right, it will run OK aside from the aforementioned problems. The carb has been rebuilt by me and the diaphragm doesn't leak any fuel.

I have a motorized bike with a Tecumseh H25 on it. It's a 127CC 4 stroke flathead rated at 2.5HP from the factory. The motor was off a large push edger, and it has a diaphragm style carburetor with adjustment screws for idle and main mix. Most engines like this I have seen have a float style...

Oops I tried to delete this one and just ended up making a new one in the right section. I guess you can just go ahead and delete this whole thead. Sorry! :oops:

Tecumseh H25 2.5HP - Max RPM? It's been awhile since I posted here. I finally got one of my engines running. I ended up doing a motorized bicycle since that made more sense than a go kart in my situation(live in an apartment and no space for a go kart). Here's my original thread...

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I have a bunch of EMT conduit I got for free. I've looked at the pre bent 90 degree bends you can buy and they are pretty smooth, like a mandrel bend. I've seen it used on cars as exhaust pipe so I know it will work for that purpose, but has anyone successfully used this stuff as a header...

I had thought about this at one point. To get over the center differential and drive train binding issues, my idea was to include a v-belt, pulleys, and tensioner as a makeshift "transfer case." Hook the tensioner to a hand lever and that will let you select between RWD only or 4x4. Also...

Well son of a *&@#&. Oh well.

Well that's too bad. I can't splurge for the current clone now and store it away. Thing is, I never really intended to spend much more then the initial $99 investment on the motor so what does it matter ? Only thing that was nice was that all the Honda parts would fit. I just wonder what the...

I take it that all the Honda GX performance parts will still work, they just rearranged the outside a little ?