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I just completed the YZ 125 shifter kart build. However I am having issues with fuel getting to the carb. I have did some tests and it seems that the pulse is not strong enough. I read online that the pulse line needs to be less than 12" and right now it is probably around 16". I can suck/blow...

I have a 1991 YZ 125 engine and has the stock original carb which is a Mikuni TM. I am not sure what the bottom feed is on the carb. The big one I am going to imagine is for fuel to go into the carb but I am not sure what the bottom one does. http://i.imgur.com/GNxnd7G.jpg Also, I noticed...

I am on the edge of completing the YZ 125 shifter kart build and I am working on the fuel setup. I have a Mikuni duel outlet pump that I plan to use. My engine has a crankcase vent with a little barb fitting on it which is just under the reedcage (Not in the reed cage). Will this work to hook up...

I have a Wildkart chassis and I purchased a 9L fuel tank. The tank however is a little to tall because it has a weird bottom. This causes the skid plate on bottom to bend out some. Instead of the skid plate being straight and fitting perfectly, it is bowed out and goes to almost the bottom of...

I am working on a yz 125 shifter kart build. I have most parts and right now working on the linkage. The linkage is always hitting the seat because of the angle it goes to. Is it ok if I bend the J arm so the place it mounts to is above the shaft it connects to?

I am building a YZ 125 shifter kart. I have two frames. A intrepid frame with matching axle bearing carriers and a wildkart frame without matching axle bearing carriers. I want to use the wildkart frame because it is a shifter kart frame where as the intrepid is more for a rotax. If I use the...

For a YZ 125 (Which I am sure a CR 125 is just the same) how far should the shifter lever move forward and backward? I want to make sure I have enough clearance without hitting the frame before it goes to powder.

I have a YZ 125 and trying to find the right size air filter. I am pretty sure the carb is a 38mm Mikuni. Do I just buy any "38mm" air filter? What exactly is the 38mm size? Also, the line that goes from the carb, where does it go to? It is the smaller line. And does anyone know the size of...

I accidently ordered the wrong fuel pump for my shifter YZ 125 build. Will this still work? It just has two outlets instead of 1. http://sharkshifter.com/zc/index.php?main_page=product_info&products_id=221

When shifting on a shifter kart with a dirt bike YZ 125 engine, Will the gear lever move up and down? Or do I just pull it down, it goes into next gear, then lever goes back to original spot? I am trying to figure out how much room I will need the lever to move.

I am looking for some clamps just like this but need to be steel. Anyone know where I can get some? http://www.out2win.com/catalog/images/BB160-014.jpg

Does anyone know where I can get one of these for a 1991 and is cheaper than 195$? Or does a CR 125 mount fit the same? Thanks!

I have a YZ 125 engine that is somewhere in the 90's year. I haven't ID'd it yet but that is what I was told. Does anyone know the pitch on the stock sprocket?

http://www.ebay.co.uk/itm/GO-KART-CHASSIS-FRAME-rotax-tkm-etc-/140975632868?pt=UK_Cars_Parts_Vehicles_Other_Vehicle_Parts_Accessories_ET&hash=item20d2cd71e4 http://www.ebay.co.uk/itm/kart-chassis-/281107771510?pt=UK_Cars_Parts_Vehicles_Other_Vehicle_Parts_Accessories_ET&hash=item4173543076...

I am adding a YZ 125 to my Formula TKM kart. I am having someone come do some modifications tomorow to the frame to support a 3rd bearing and possibly even build a engine mount. What other parts will I need to get this running? Radiator and support hoses Sprocket Chain Shifter Lever and linkage...

I have a older frame that uses a circular bolt pattern to accomodate 30mm axle bearing holders. Has anyone ever cut theres off and welded new metal to make it work? What should i look out for?

I have a kart and I want to convert to shifter kart. I took the old Ital Sistems MV31 off and loaded the YZ 125 on it and it does not fit properly. I can tell that the seat brackets will need to be altered. I am not sure if it will fit even then but I want to keep the seat in perfect line with...