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By AimlessMoto
Hey guys, new here, but haven't found ANY answer to my specific problem on a Suzuki dedicated ATV forum, so here's to hoping!
I acquired a 95' Quadrunner 250, 4x4, (LT4WD) for practically nothing with no spark. The PO had tossed in a used stator which didn't fix the problem... so I went all routes (though cheaply) to narrow down the initial problem of no spark.
Plug, coil, CDI (caltric) and stator w/pickup (caltric) were purchased and installed. And it RAN, but bogged horribly and would not rev past 1/4 throttle.
I checked fuel flow, vacuum lines, all the normal stuff, no issues. I decided to check the valves and cam... well, there was one problem. The cam was 1mm under the lowest spec in the manual. So, in-came a new cam, Stage 1 Hotcams... also threw in a new set of shindy valves, lapped them, replaced the valve seals, and the timing chain.
Back together again (w/stock airbox and new oiled filter). Now it idles even better, still boggs at 1/4 throttle, but will rev past it if you hold the throttle open for a second. Ahaha... success!
So I was able to ride it above 1/4 throttle once I had momentum... could shift through the gears, all was good as long as I kept it over 1/2 throttle. Took a long enough ride to break in the cam properly at least so I won't have to worry about that.
Now, I start fiddling with the carb. It's clean as a whistle, stock, with stock jets (new replacement Mikuni jets). Same problem.
I start thinking, maybe this is fuel related and the bike is having an issue transitioning from idle jet to main jet... so I LOWER the needle by raising the clip 1 spot. Now it revvs up in neutral with no bog, but it boggs about the same trying to ride it. So I move the needle down again with the clip on the top slot. Better, but still has a bit of bog at 1/4 throttle.
The last bit of advice I got was to ditch the CV carb... so I sprung for a brand new Mikuni VM30-83 round-slide. Bolted it up, blew into the vacuum tube to fill it with fuel (no vacuum port on this one) and she fired right up... but there is still a bit of bog, it's just masked by the fact that I'm not waiting for the vacuum diaphragm to open.
So I feel like each little step brings me closer, but not perfect. I'm now wondering if this is still in-fact a carb tuning issue (I have some jets I can fiddle with and maybe lean-out the idle jet a little.) OR if the cheap-a** Caltric Stator/Pickup is what's causing these issues.
I have a 95' KingQuad with 400 miles on it... like new.. runs like a top... I've tried both the stock QR and the Caltric CDI boxes on it, and it revvs up and runs like a champ.
The only unknowns between the two systems are the carb, and the stator/pickup. My next step in troubleshooting is to rip apart the King Quad and test it's CDI on the Quadrunner... but considering there is no change to how it runs I doubt it will lead to a solution.
HOWEVER... I tried the stock CDI just recently after running the Caltric this whole time, and the bike runs like garbage. Hardly idles, and won't rev up at all. So, that is my one smoking gun telling me that it's either the pickup coil or the stator itself.
Has anyone had a problem even CLOSE to this? I can't image the carb would be causing this many issues, especially going to 2 different ones, both with stock jetting to OEM, and exhibiting the identical symptoms... the only change is when different CDI's are plugged in, or when the needle valve leans out the mixture.
Also, I checked the piston, rings and bore when I had it apart and they're like-new... no scoring, rings are loose, cylinder is still round and has honing marks still int he bore. Stock piston, stock bore size and it has 160psi compression. Battery is brand new, and I've tried 3 different R/R's, none of which change any symptoms, but slightly vary the charging voltage by .2-.5 of a volt depending on which unit. Also tried a new coil which changed nothing.
ANY help would be appreciated. Too much invested to not get it running right.
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By w_r_e
Can anyone point me to a good set of instructions for changing front diff oil on a 1987 Suzuki LT4WD? I can almost guess which bolts are drain & fill... but I've been wrong before... 😆
I found some partial posts on other forums and they linked out to dead images and whatnot. Any help appreciated.
This thing is running pretty good, got the front brakes back to life, electric start works fine, seat cover fixed up, plastics stitched back together...
BEFORE (last week):
AFTER (today):
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By crochet homemade
I have bought a 1996 suzuki king quad 300 and I have noticed that it smokes but I have put oil in it and plenty of gas had to fix shifter bc the nuts and bolts came out somewhere. I have had to replace the wire for the starter but now when I try to start it it wont idle at all and when it does run it smokes really bad like a whitish blue I guess, and it likes to stall a lot. So anybody can help me out please and thank you
10000000_310855426253462_714534016610467840_n.mp4 -
By Alex91
I have a 92 suzuki king quad that seems to be getting way to much fuel in my spark plug hole as I took out plug cranked it over and covered myself in fuel I cleaned carb and fuel filter and fuel pump all seems fine any other ideas
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Similar Tagged Content
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By Jason Magnone
As stated above working on a 1999 Suzuki LT-F160. I think I’m having trouble with the carburetor. I keep fouling spark plugs. Full disclosure, I did make a poor attempt to “rebuild” the carb (that’s why I think that’s the issue). No idea if the new parts are at the correct “settings” (gaps and such) I believe the starting point is 1.5 turns from bottom out on the adjustment screw (is there another adjustment I don’t know of?). Doesn’t feel like I’m getting gas drawn through the carb (clogged jet maybe?), the plug isn’t wet at all (assuming why they’re fouling?) Not a great deal of experience working on carbs and not having much luck on finding a lot of info on the 160’s.
1st- by chance can I swap out the original carb (13200-02C03) for an LT 250 model (think the HA01050). They’re only about $30 apposed to $200. That would at least narrow down if it’s a wiring problem or carb issue.
2nd - The wiring has been minipulated at least a dozen times (before I acquired it, my cousin got it from a buddy kind of thing). Hopefully don’t have to dig into this too much as it’s currently a bit if a mess.
I was told it ran last year...
Any imput would be greatly appreciated
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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!
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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?
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By Rob2360
Hi All.
Have quad with the 59V044570 on both the frame and model. So could some inform me its model, so I can order a few part for the bike.
Cheers
Rob
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By Resurgence Small Engine Inc.
Not satisfied with the commercially available versions, Jonathan recently built an ATV spring compressor.
In this video, he demonstrates using it to remove & re-install the spring on an ATV coil-over shock absorber.
Mistake in video - the coil-over shock is not quite a McPherson strut.
If you are inspired to build your own spring compressor, feel welcome to use any ideas from this video.
Thanks for watching! Resurgence Small Engine Inc.
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