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By hisun junk
As I tried to do a conversion with the Yamaha 660 motor, I realized the 660 was never fuel injected so it would not work for the fuel injected hisun motor swap. But the good thing is the hisun 750 motor is a clone of the 660 Yamaha but with the components for the fuel injection (cam/crank position sensor). So that left me with a new rebuilt Yamaha 660 and still a broke 750 hisun motor. I took apart 750 think the timing chain had broke from all that I've heard about these motors. The chain was not broke, but just off cam and crank gears! The chain tensioner was at fault! I've ordered Yamaha 660 replacement parts, chain, two exhaust valves (which got bent when chain came off while motor was spinning) and seals. The piston has 2 little nicks where it had hit valves but no damage otherwise. The head is being redone at the machine shop and I'll be putting it back together in the next couple of weeks. Also I finally tracked down a Service Manual with all the info on the 550/750 Challenger.
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By Jacob E freeman
I have a 2018 cub cadet challenger 750 I bought brand new almost 2 years ago the first month I had it the exhaust broke and burnt the spark plug wire in two that was a recall so the dealership installed the new one it had a different design and it bolted up to the bottom two plugs below the spark plug the dealership said they had to Adjust the exhaust valves I get the machine back thanking everything is good now wrong not even a week after I get it back the timing chain tensioner comes apart inside the motor I take it back to the dealership They put one on I get the machine back thanking everything is good but then just like before not even a week goes by when I was riding the Machine automatically quits going come to find out the wet clutch was burned up the primary clutch head stripped off of the splines I get that fixed and then it overheats I take it back they bleed the air out of the coolant they bring it back to me the same day that I get it back it overheats again I take it back they temporarily fix it again just enough to let the warranty run out and now the machine has been to multiple different mechanics I have had them try to bleed the air out they have stood it up on its end I have had the water pump changed I have had the fan hooked to a switch so I could leave it on all the time but still almost 2 years later not even 200 hours on the machine and I cannot ride it The dealership will not take it back as a lemon I have tried I am at my wits end I have no clue what to try next
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By Will Sutton
I've got a 2023 UT400 (bought from tractor supply) and I've been beating my head against a wall with it.
It will start and idle perfectly. The second I touch the throttle it sputters and dies.
I've checked that the fuel pump is working (it is).
I've replaced the injector, throttle position sensor, O2 sensor, and intake air sensor. All with no change.
I've just taken a look a the schematic, and there is a crank position sensor as well.
Could this be the source of my troubles? If so, where is this thing located? I can't seem to find it on any drawings from the parts suppliers.
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By Jim Kessell
2005 American Landmaster
EH65 Subaru Robins
spits fuel from breather hose into the air cleaner and then down into carb. What’s causing this ??
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By Gary Gallo
Just wondering if anyone has had problems with bed warping coming from the heat from the muffler.. If I ride more than 5 minutes my bed starts warping from the heat.. Does anyone have any recommendations on what wrap or shield I can get to prevent this before my bed starts cracking or the warping becomes permanent.. I only have about 50hrs on the UTV.. Basspro said they haven’t had this problem from anyone else.. Hard to believe..
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