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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 BeachBuggy
Massimo Buck 250 less than a year old. 900 miles on it. Live on beach in TX...i.e. corrosive salt air and normally mild temps.
The story - one day, it randomly quit on idle and was tough to restart. Next day, it occasionally cut out for 1-2 seconds while driving, then catch back to normal throttle. Pumped gas pedal, not sure if that helped it catch. Added some marine sta-bil and filled tank. Ran well after that for a day. Following day, wouldn't start. Turns over, cranks, but won't start. When it quit on idle that was the first time driven since we did have a freeze of ~25 degrees.
Full charge on battery. No spark. Changed plug and still no spark. Fuses look good, but fuse connection box has some loose clasps and spade were corroded. I bent clasps best I could and used dielectric on spades re-inserted. Cleaned and checked every connection I could find. Don't have a card reader to hook up, but did swapped ECU just to check that, and no change...after swapping ECU the engine light now stays on. Previously blinked and then goes away.
Under warranty but service place is 2 hrs away.
thanks!
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By lincolnsq175
Ive searched and cannot find any performance parts that fit my machine.
I have a 2020 coleman ut400.
Im looking for machined sheave kit, programmers, cdi, exhaust and intake.
I know these are yamaha rhino clones but are they rhino 450 clones?
Any info is appreciated.
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By cliffhodges
Hi All- Long time reader, first time posting. I have a 2016 Mule 4010 (model: KAF 620V). I am having an issue since overloading the payload a couple days ago (yes I'm a dummy). I live on a very hilly property and I was trying to move some large oak rounds for firewood splitting. I put WAY too much wood in the bed and when I started driving, it sputtered, kicked out of gear, and then cut out. I unloaded all the weight and started it again - appeared to be running fine when idling and/or driving on flat ground at slow speed. But when try to go fast or uphill, the RPM's rev high and it sounds like the motor is fine, but it has ZERO speed or power at all (literally creeps uphill at like 2-3 mph and won' go faster or take any weight), and has no power at all.
Other info: 3 weeks ago I did a belt replacement. So I was worried I perhaps screwed that up somehow. But I just opened the clutch housing to check and the belt and clutch appear to be working just fine.... sooo.....
Any ideas what I screwed up by overloading payload and immediately trying to drive uphill? Any tips would be greatly appreciated!
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By robwork9
Hopefully someone out there is a T-Boss 410 electrics expert or a Massimo mechanic is viewing this. I parked my 410 and it was working great. I came back a week later and attempted to crank it and nothing. Turned the key and no power. Figured it was a bad/low battery so I charged it. Still nothing. Attempted to jump start it and still nothing. Usually when I put the key in and turn it to the first position, the display comes on and I hear the ECU and other items boot. Now it is doing nothing.
I slowly went through the electrical system and found the main fuse attached to the starter relay, part 71602 (pic 1) blown. I figured replacing this fuse would fix my problem. It didn't. I then ordered a new starter relay thinking maybe that part had gone bad and caused the fuse to blow, but a new relay did not fix the problem.
I have found a work around for starting the machine. If I take one of the purple/black leads (pic 2) and insert one of them in the bottom right of the starter relay (pic 1 and 3) then the machine will get power even with the key in the off position. I'm bypassing something but don't know what. I can use my right hand to hold the wire against the lower right of the starter relay, reach over and hold the brake with my foot, then take my left hand and turn the key and it will crank. As soon as I remove the wire from the relay the machine shuts down. I have even removed the power distributor box and it will still get power when I touch the wire to the relay. Of course this is not the way it should work but if I can't solve this problem somehow I may just have to rig a connector to the relay and bypass whatever is causing the electrical issue. Massimo has told me the purple/black wires on my model are not used.
Any help in figuring what my problem may be or other items I can try?
v/r,
Rw
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