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By Ed Zeppeli
I picked up this quad after the previous owner couldn't get it going.
The issue is that I can't get it to fire at idle or at all.
- replaced plug. Decent blue spark. Also tested with spark tester inline.
- rebuilt the carb. PO had already bypassed vacuum lines from petcock. There's fuel at the cylinder
- Checked compression with new gauge. reads 190 psi
- cleaned all contacts I could access.
- am currently jumping with car battery. Solenoid jumpered.
- checked cam timing at TDC and adjusted valve lash
- put gas directly into cylinder to see if it will fire at least momentarily
Motor turns over well. Plug gets wet.
Motor may fire once or twice but smokes through exhaust a bit as if it's trying to fire or combusting.
This leads me to suspect timing. As mentioned I checked the flywheel mark versus cam marks. Perhaps someone has been in there before because I can't find a 'T' on the flywheel but there is a very visible paint mark which aligns with TDC position on piston. Possibly a slipped flywheel/woodruff?
Is it possible that if it had seen previous repairs, that the timing could still be off? I'm reluctant to dig into the flywheel/stator area if there's something else I could have missed but all signs point me to that area. Would a bad CDI cause spark timing to be off?
Anywhere else to diagnose incorrect spark timing?
I've scoured these forums and elsewhere but I'm posting just in case there's something I've overlooked up until now.
Thanks very much for reading!
By Chad Dickerson
I am goin nuts here! I have a 04 400 air cooled 4x4 , I'm a atv,car,truck,mower mechanic for yrs,just sayin. Ok it cranks and kinda fires now and again then after 5 min of cranking and stopping itl start if u touch throttle itl did then u start all over! If u let it warm up sumtimes u can throttle it up other times it just does! Just depends on it? When it stays running it runs awesome,no problems except it just does randomly like u shut key off? Sumtimes itl start right back up others itl do the no start thing! IV put new plug,adjusted valves and hot tanked carb? I'm at a loss here guys! Please any other ideas? I don't think it's anything to do with flywheel? It's not the auto it has a hi low reverse lever on left fender and foot shifter? Help please lol
By Christopher Middleton
Anyone have one or know where to get a replacement or the body of one? I found one place but they want $245.00 for it and at that price ill just keep pull starting it. I live in Michigan. i have all the old parts but the magnets blew up in this one. I think previous owners tried to free it up with a sledge lol
By Scott Matthews
Just picked up a 1989 Big Bear 350 for $250 CAD. Bike was running but lost crank and spark. They've installed a new coil, a couple relays, and installed a Ford starter solenoid in place of the original. Now it cranks but has no spark so they sold it to me. Does anyone have a wiring diagram for this bike so I can test some wiring. Also any ideas as to direction to head would be nice. Lots of things have been hacked together so I know it probably wont be to easy. The ignition switch was replaced with a toggle switch, I already mentioned the Ford solenoid which 1 of the small wires was not re-installed, and a diode or something was removed from the oil temp sensor wire. I'm sure I will find more so a diagram would be amazing.
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By Dee Wilson
The short of it: I'm getting a single click when I hit the start, and nothing else.
The long: I'm a new owner to a 94 Timberwolf. I inherited it with the understanding that it needed a battery. It started without the battery when jumped, so I know it does work. I got the appropriate battery, charged it, and its reading 12.7V. Installed it, and all I'm getting is that click. Cleaned the carburetor today and reinstalled under someones advice, but still nothing. I'm gonna take the battery in to autozone to get it checked, and I was going to head to the spark plug next. But like I say, I'm new to this. Thanks for any and all advice.
By Zacharia Maisonneuve
i have a 1993 timberwolf yamaha and the compression is good and lights work but for some reason the electricity is not going to the spark plug(s)! i got a friend to check it out and they said its no use but im not giving up! please help with this!
By Connor Tuftin
I have a 1988 300 Honda FourTrax, All wheel drive.
My brother and I were fixing up this quad. We put a brand new battery and fuses in and it was running fine until we put the quad into reverse. As soon as it was put into reverse all of the electrical cut out and power wasn't making it to the head unit anymore and both of the brand new fuses popped. We figured there might have been a short from the starter or solenoids, but they are all working properly. At this point we don't know where to start looking for where the short could be. I'm just wondering if anybody has had the same issue or knows of similar issues that could cause these electrical shorts?
Yamaha Grizzly 700 gets STUCK in Pond Huge thanks for https://myneighbourhoodnl.com/ for the rags we mentioned in the start of the video! we will definitely put them to good use! A few close calls in this video thats for sure! thought I sunk the ol grizzly for a split second... Gotta love Yamaha with their single cylinders. I really think its time for them to come out with a twin now! But gotta stay true to the Yamaha grizzly 700s! This was a really cool run that we happen to go on. no route for the yamaha grizzlys 700. Just picked away finding spots we never went before really. Make sure to follow the yamaha grizzly 700 on instagram! instagram.com/offroad.dan instagram.com/muddymillz
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