cameron walton

Hey @Frank Angeranocould these numbers be missing a 0? I can’t find feeler gauges this large. Most are .005 not .05

It is an OEM rebuild kit. I just got the 12 mm compression adapter and it reads 60 psi with starter button and goes up to around 70 if I pull start it a few times. I'm guessing this is the issue. Anyone have any suggestions as to where to go from here. It will run, not idle and has 60~70 psi compression.

Choke does not really seem to help even though I have confirmed it has a clean passage from the air intake thru the carb when engaged. regarding the pilot jet, it is brand new, i can see light thru the holes and squirt carb cleaner thru them. Do you still think wire is needed? To check the flange I sprayed starting fluid on the intake tube from end to end and didn't see a increase of engine.

Hi Scott, I can start it with the pull start and throttle half engaged, I can keep it running with throttle, I can drive it like this and it seems fine. After cleaning/rebuilding the carb twice still cannot get the thing to idle. It does appear after more research the engine was replaced with a 1999 timberwolf engine, intake and carb. I am waiting on a 12mm adapter to test compression maybe these is and issue? This is definitely a project that I was thinking was easier than it is. I bought the quad for $500 and the guy said clean the carb, replace the battery and change the oil. He used a truck to hot wire it to show me that it ran.

Stator to ground is open on all 3 phases. I also changed the spark plug again as a cheap measure of "what if". Same result.

.6 phase to phase - Stator 0.45-0.55 phase to phase 200 ohm white/green stripe to white/red stripe - Pick up coil 189-231 294 ohm red or orange to black wire - Source coil 270-330 Seems like these all read within spec

Thanks I will test this, yes I am much more electrical than mechanical. I'll double check and post the findings. Thanks Thanks again Scott, I'll keep this in mind when I get it tested.

Thanks Scott, I can see light thru the pilot jet and squirt card cleaner thru it with no issue. I'll check the stator. Does anyone have the specs for testing the stator, CDI, coil etc in this circuit? Or the service manual

just to add something i just noticed, it does start faster with pull start than electric start. Ie, sot of starting fluid in the intake, half pull it's running. press start button you hear a deep tone of it trying to do more than roll over but never really firing.

Hi Guys, I'm a newbie but pretty handy with a DMM (controls technician). I have been fighting a junker quad i picked up as a project bike, was assured it would run if I replaced the battery and cleaned the carb. I replaced the battery, rebuilt the carb with a OEM kit. FIxed all my switches and foul played circuitry from the last guy.... So I could get it to start long enough to test the quad, it seems okay from a trans/engine point. However I couldn't get the carb adjusted to idle to save my life with the idle air screw or the thumb screw on the card for the slide. I took it to a friend who is much more familiar with yamaha and quads and he double checked my carb rebuild all was fine, he adjusted the float to make the fuel not overfill which i missed. He pulled the air intake, got it started and couldn't get it to idle with or without air filter. We started looking at the spark plug (new) and he tested it with a spark plug clamp meter, tested good, pulled it and grounded and it had spark but he felt it was weak. I order a working used oem coil to try the easy things first. When I ohm out the coil on the quad with my Fluke i'm seeing .4 ohms on primary (ground lug to male connector) and 18K ohms on secondary (inside boot to ground lug). Seems like this forum is full of bear trackers so I'm hoping someone has some ideas to help me figure where to go with this. His thought was he know I ave fuel and he knows I have air, spark would be next. I have spark but possibly weak. Thanks