strike250

Just checking in to see how things are going for you

did you get this issue fixed? I would see what I could do to help you with it.

did you get your problem fixed? just curious.

did you check to make sure the cylinder head was not warped? if it was, then the head gasket will never seal correctly. Also keep in mind on the smoke, it will smoke for a bit if any coolant gets into the exhaust pipe, it takes a little bit to burn it out.  If you have the head off, check the surface to see if its 100% flat. any warping will cause a poor seal. Also check the cylinder to ensure its not warped as well. \

Have you checked the temp sensor? it might not be turning on the fan.

Yes, it is very important to have those splines in place before tightening the nut, this is the result. I have seen it on many yamahas as well.

Here you can see in the parts catalog it calls it a speed sensor, but I will confirm by Monday for you.

In the manual they call it a fuel seal (#5), but I dont have a part number or price. it doesnt look very expensive at least.

but with correct year and model, I can get you the exact information

It should be the speed sensor cover,   about $20.00 P/N 36500-003-0000 contact motorcycle doctor

can you give me the year of your unit

I know this might sound silly, but have you checked the CVT belt to make sure it is not broken? This is what a broken belt sounds like.

You can get a rebuild kit at your local Yamaha dealer, or Amazon or eBay.

As for the pistons in the brake caliper, they are held in place by O'rings. If you are having problems with the brake caliper being locked up, it sounds like maybe you have contaminated fluid, causing it to crystallize and seize the caliper in place. You should be able to use compressed air on the banjo fitting side of the caliper to force the piston out. If not, then you can soak it overnight in wd40 type of fluid to try to penetrate the back side of the piston and help release it. If not, I would just purchase a new caliper. These calipers are the same as Yamaha Banshee or Yamaha Raptor 600.  You can find a bunch on ebay. The piston does not screw in, it should simply press in and out. Remember to use quality brake fluid, DOT 3 or 4 is fine as it again sounds like the fluid has water or something else that caused contamination.

The brake pads used are: Front brake pads: EBC FA54
                                                         Rear brake pads: EBC FA83

More than likely just a belt, but inspect it first. You might have gotten lucky. As for the breaks, look at a Yamaha banshee or raptor, same exact brake caliper. Yamahas manuals are much better on rebuilding brake caliper than HiSUN. The brake pads from EBC are listed in the parts interchange list in the download section of my website. Do not go off EBCs website, they have the incorrect parts numbers. The correct ones are listed on my site. Hope this helps

Call me if you have questions or problems. Numbers on my website warriorsoffroad.com 

Hisun motors is also the manufacture of many parts for Yamaha and other big name brand UTV and ATV manufactures. Keep in mind that Polaris RZR170 is also a chinese built UTV. If you've driving any other large brand name ATV or UTV, you have most likely had a vehicle with Hisun parts in the engine or elsewhere. They just started to make their own footprint in the billion dollar UTV market. They have been around now for over 5 years and with sales increasing more and more every year, the dealer base growing slowly but surly, they will be around for a while yet. Hisun and Bennche and Massimo and Coleman and so forth are going through internal growing pains. They all want to be the top dog, and word is that Bennche and Massimo are going to split away from Hisun soon. So their models might change. The reason you see the Hisun brand looking so much like Yamaha and Polaris is due to the fact that they actually manufacture the OEM parts for them at Hisun in China. Thats why they are called Yamaha clones at times, or Polaris knock offs. Currently Hisun makes all the brands for themselves, Bennche, Massimo, Coleman and more all just re-brand the Hisun product. Kinda of like Chevy and GMC, just a couple of different things but the same vehicle and different name. Sometimes the two companies fight internally against each other. 

Most of the parts in these UTV's are crossed referenced with Yamaha or another big name brand.

check to make sure the exhaust is not plugged up.

check with motorcycle doctor, better pricing and keeps lots in stock.

For what you are doing it should be just fine. Remember the manufacture is the same one who makes parts for Yamaha and Polaris, its just the nuts and bolts that are not the best. The engines are pretty much bullet proof. The things that go bad are things like weak clutch when pulling heavy loads, bad coil every once and a while. Other than that, you should really be fine with messing around and driving it on country roads and home farm use.

It sounds like the muffler might be plugged up, I would see if you can take out the packing and check it.  There is no reason that muffler should get that hot, unless its preventing the exhaust flow from getting out, creating back pressure.

dumb question, but did you check to see if the seat belt is connected, they started installing ECU safety lock out and it puts the vehicle in limp mode until the seat belt is connected . Please check this first

To check out the fuel pump, it should prime for about 3 seconds after start up, you should hear it. I would check for a pinched fuel tank vent hose, as this could cause a huge pressure lock inside the tank. Next I would suspect it might be electrical in nature. I doubt any fuel injector problem as that is pretty rare. Some of the things that cause this issue would be a faulty coil, or bad pick up coil sensor. It takes fuel, spark and compression to fire an engine.  Normally a stalling issue or no start, to me it sounds like electrical, but check the fuel pump first. You can open up the fuel cap and when you put the UTV ignition switch on and not start, you should hear the fuel pump whine for a few seconds then shut off. If you dont hear the wine, I would think the pump is bad. If you hear the wine everytime, then chase the electrical system.

Keep inind when you change your wheels to larger/taller ones, you effectively change the gear ratio. It might be quicker, but you'll loose top end. Also it takes more torque to turn larger tires, and these little ones don't have very much torque to begin with. The factory HP ratings are only around 10-12 HP from the factory. 

Hello, I would send in your ECU to me, let me flash it and also if your rear sprocket is a stock 42 tooth, I would go to 38-36 rear sprocket. The lower the rear tooth count will provide you with the higher top speed, the lower rear tooth count will give you quicker off the line.