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in this thread, I want to discuss how 4-cycle atv engines work- what the different types are... how they are set up and which you prefer. To start off, are the cams on ALL atv 4-strokes powered by a cam chain? I know that on say a lawn mower or logsplitter engine, the cam is turned by the tappet, pushrods, and valve rockers. Which is better and why? Chain-driven cams or pushrod-driven cams? Are the pushrods just an old version and everything is transforming to chains or the other way around...or not at all? Just looking for some explanation, history, and downsides/upsides...
Here is what I have collected over the years and maybe it will help someone else.
There are so many and several are too large to upload as attachments, so see any thing you need just shoot me a PM and your email and I will get them on the way to you as fast as I can.
50cc to150cc Service Manual For Tank Motorsports.pdf
1986 CH250 ELITE SERVICE MANUAL.pdf
Charging and ignition systems for atvs.pdf
Chinese ATV Frame Diagram.jpg
Chinese ATV Repair Shop Manual - Clutch Diagram - Exploded Views.jpg
Chinese ATV Repair Shop Manual - Cylinder Head Diagrams.jpg
Chinese ATV Repair Shop Manual - Torque Specifications.jpg
Chinese ATV Repair Shop Manual - Valve Clearances.jpg
Eagle ATV Fender Body Parts Exploded Diagram.jpg
Eagle ATV Rear Axle - Exploded Diagram.jpg
Piston Ring Installation 4 Stroke Engines.jpg
Trouble Shooter Guide for BATTERY DRAINED Chinese Engines.txt
Trouble Shooter Guide for NO-COMPRESSION.txt
Trouble Shooting No Crank.txt
50 to 150cc GY6 Shop Manual.pdf
Arrow 150 Engine Service Manual.pdf
Eton Shop Manual YXT-150.pdf
GY6 Shop Manual.pdf
Yerf Dog Spiderbox GX150 Service Manual.pdf
Hey I have a 97 bayou 300 2x4 (klf300b) that i bought for 1000 last June and sunk another 1000 into it already. When i went to look at it, the seller had warmed it up before hand (he was riding it when I got there). it ran good so i bought it and took it home that evening... next morning it wouldn't hardly start. I discovered the carb was clogged, there was chunks of rust in the fuel valve, the choke lever was missing and other things. I have since cleaned the carb and replaced the fuel valve and gas lines and cleaned out the gas tank and cap.
Enough background on it, the problem is this: It floods if i push it past half throttle in 4th and 5th gear even going downhill and shifting correctly. It also has to idle and warm up when you first start it which is really annoying now that its cold... It also smokes blue smoke for about 15 seconds when started cold- does not smoke at all once warm but the exhaust still smells like burnt metal. A friend told me that it didn't have enough compression. I also found out that the valves are a common cause for low compression on Kawasakis.. I have never adjusted valves before- the most I've ever got into a engine was a head gasket on a riding mower so I'm new to this. My goal is to get this bike running and starting cold like a top- should i tear down and rebuild the top end? What should i try first? I tore the carb apart and rebuilt it and fiddled with the air screw and nothing changed. I also ordered a compression test kit that should be coming in soon.
Ive also considered just selling it for like $500 and taking the hit- Id rather not sink too much more into this machine.. lol
By Wolds Alpacas
Hello - I have just had delivered my 2004 registered King Quad 300.
The gear change is pretty fierce. Pretty hard to get into gear from neutral on the foot pedal and when I select reverse on the hand lever, it jumps into reverse with a hell of a kick.
I am waiting for a service manual to arrive, but in the meantime, has anyone any suggestions please?
By Nick Martini
I haven't had a dirt bike or ATV for years, but a buddy of mine just picked up a raptor 700 and makes me want to get back into the sport. I'm looking for the best bang for my buck utility quad that can go in snow, but also hit some small jumps and trail ride. It would mostly be used for light trail riding; not really any mud holes or jumps around me (Bristol, Massachusetts). My last bike was a 2004 yz125 2 stroke and it was a pain. Every other ride I was doing something to the bike. I'm looking for a utility quad that I can ride for a month without having to touch it. I've done a bit of research so far and it seems like my best bet would be ~2014 Yamaha grizzly 700 with ~1000 miles for about $5,000. I'd love some more opinions from people who are more knowledgeable about the sport. I'm looking to stay around that $5,000 range. Also, there's no trails around me to go more than 40 or 50mph so I'm not too worried about keeping up with the 700.
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By Bubba Blaster
Hi there, new owner to a Bayou 220 and could use some input from those who have owned these. At idle only, I am hearing a distinctly noticeable amount of chatter noise coming from the lower right side of the engine - right in the the clutch housing area. It's like a light clanking sound like something is loose in there. It goes away as soon as you give it throttle. Shifting in and out of gear is smooth and there is no change in the noise if you have it in or out of gear. The clutch doesn't slip at all, it's just that noise. I can also feel it when my hand is on the the clutch housing.
I just replaced the oil and filter with 10w30 motor oil per spec. Any thoughts?
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