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Torque converters work really well with governed engines, max torque is around 3500rpm. The torque plates should be polished by the belt and therefore shiny. The torque converter pros will chime in, belts wear, buy the best belt for your TC is -comet- I'm not a TC man, but the guys always point...

Did you bed in the rings with 'bedding in oil' it's a specific high ZDDP additive oil. Are you using the correct oil for a splash feed system. Is the pcv getting blocked (it's in the rocker cover) If not oil based is it running rich? check plug colour, aim for a tan colour around the tip ceramic

If all the fuel delivery to the carb is good, it's usually down to the gaskets and insulator. Jetting a standard carb for a basic upgrade isn't always required. Take the plug out, it should be a nice tan colour around the tip, whiteish and it's running lean, black and it's running rich.

Sorry in the UK, cost a small fortune to import. Plus I love building stuff.

Just finished testing the hand held electric starter. A full strip down and paint to follow, I'll go through the entire build process as a single video

I'm from the karting side of things and the centrifugal clutch rules BUT we want the clutch to come in around 2600rpm and snap on, I rev to around 8000rpm, the kart is geared accordingly 17-83 with 10inch tyres, torque converter looks to be the thing for your setup. Denny has a lot of input for...

Well I'm still working on the go kart efi engine, I've built another ecu and now have looked at the logs to find most of my issues are with trying to start it. The ecu needs to see a smooth start to stop it resyncing the missing tooth and messing up the ignition events. I have purchased the...

Re-Posted in Engine section

Well I'm still working on the go kart efi engine, I've built another ecu and now have looked at the logs to find most of my issues are with trying to start it. The ecu needs to see a smooth start to stop it resyncing the missing tooth and messing up the ignition events. I have purchased the...

I wrote a similar post then deleted it, I think ebay may have a 4 carb setup, I wish young posters wouldn't abbreviate words 'thumb text' These posts are around for a long time and can help fellow enthusiasts. High revving engines require fuel injection or a carb for each cylinder. There's a...

If throttle bodies, stay with them and keep the efi.

That's cute :) Single wire coming from coil short to ground to short coil and stop the engine. https://g.co/kgs/rFZTGaJ

It's got one of these on it, I can guarantee he didn't pay that for it, in fact I may have given it to him...

Flywheels don't just explode, they have a safety factor of operation. We run a standard flywheel on one of our tarmac karts, this has had the above work done. The 390 falls flat at 5500rpm. The cam and springs prevent it going any higher. In this video we're just sorting the ignition. All...

Advantage- torque torque torque Disadvantage- weight and parts are expensive if you can get any. The good thing about any GX engine is that performance mods involving labour and a dremel will reap rewards. Skim the head for higher compression, gas flow the head, remove the oil sensor and...

The long brass tube is the emulsion tube. Old carbs gaskets can get a little brittle, needle valve can stick etc... remove the fuel line and make sure you get a flow after the filter. Once confirmed of fuel flow then it's time to look at the carb again. Find out what carb it is then look at a...

Our karts run Mikuni pulse pumps with return lines, a simple fish tank air clamp is used to fine tune the fuel pressure

The cam will be the defining factor on pushrods. Std cam with 18lb springs fine. Well tuned carb, free flowing exhaust, 32degree timing. Oil sensor and governor removed, you're good for a noticeable increase in torque and hp without revving the nuts out of it. Start to rev past 5500rpm and it...

Head work- porting etc, and a thin headgasket will reap more rewards than just sticking a carb on it, offset key for ignition allows for it to have more power higher up the rev range. Cheap performance upgrade. I understand most people don't have the desire to carry out the head mods, plenty of...