99/01 Yamaha warrior 350 timing

[Hashlion]

  Ok. Here goes nothing. I have a Franken bike. It's half 99 half 01. Not really a big deal. So the lady I got the bikes from said it jumped time and won't start. One bike is complete and assembled the other is in pieces but there. I have had these for two years.    I immediately did a tear down and rebuild. I went over everything. Well fast forward to now. I found that she only had 4 head bolts in it . That is why it jumped and also why she said the timing chain had to be real tight. I can get it timed well enough to start and idle rough. I've replaced bout everything. Compmetely new head and all head components. Upper cam gear, chain,cam,the whole thing. It won't line up matter what I do. The timing marks are just a wee bit off. It won't rev just backfires and dies.  I've had the bikes for two years and can't get it. Great spark-built a bare bones harness myself. Great fuel-rebuilt the mikuni and bought an aftermarket, same outcome. I ha e half of mind to sell the two and but something else. PlEase help. The wife might kill me if I work on it anymore. Idk

[Hashlion]

Man nothing?

[Mech]

The cam timing can be a half a tooth off, till you move the crank one tooth.

If it's not looking like it will line up the marks when you move the cam sprocket one tooth, try moving the crank instead which will be equal to a half a cam tooth..

And try to be patient..All good mechanics are patient..

[Hashlion]

Oh my God. It's like there is a light at the end of the tunnel. I've been on 3 forums including ultra x. You are the first person to suggest this. Your sure it's a half a tooth on the crank? Well I'll be a monkeys uncle. I hope this works, 30thtime pulling the flywheel. I literally can do it blindfolded

And If it works ill buy you a beer.

[Mech]

Yeah the gearing is two to one between the two sprockets. If you leave the crank in the same place, and move the cam sprocket one tooth the timing looks a half a tooth advanced, and one cam tooth the other way it looks a half tooth retarded. So you turn the crank a little and refit the chain, and then refit the cam and it comes out right. One tooth's worth of travel of the chain on the crank, is equal to one half tooth of chain travel on the cam.

 

[Mech]

I should have got back quicker but hopefully this will save you some work pulling the flywheel off..

To do as I suggest and move the crank by one tooth you don't need to pull the flywheel.

For the sake of an example we will say that with the crank timing marks lined up, the cam timing marks are a halt tooth to the right(clockwise), and that the cam timing marks are straight up and down. If the timing marks are flat across then you could put a mark straight up and down.

All you need to do is hold the chain at the very top, in line with the mark on the sprocket, you will be holding a link that's slightly to the right of the very top, then pull the sprocket away from the cam and drop it down, work the chain off the sprocket. Now turn the crank till the chain has moved one link through your fingers. In this example the crank would need rotating to the right(clockwise). Now slip the cam sprocket up or back in and fit the timing mark, or the mark you'd made, back into the link between your fingers. Put the sprocket on the cam.

Now you have the timing mark, the mark that used to be a half tooth to the right, back right where it used to be, looking a half tooth to the right.. But, when you turn the crank the one tooth's worth of rotation it need to get it's marks lined up again, (to the left/anti-clockwise), the cam is going to move half the distance, or a half tooth. Both marks line up. Turn the cam till the bolt holes line up and put the bolts in.

But, but, but you say, how can that be(I've heard this before), the chain got moved one tooth on the cam sprocket, which you'd already done thirty times.. It doesn't make sense..  Well, the answer is.... To move the crank sprocket by one tooth, takes a certain number of degrees or rotation, but to move the cam sprocket by one tooth it takes twice as many degrees of rotation of the cam as it would of the crank to move that one tooth.

Hope that helps anyway and speed up the job a bit.

[Mech]

Bahaha...

And I got it wrong.. too funny.

In actual fact.....

To move the crank sprocket by one tooth, takes a certain number of degrees or rotation, but to move the cam sprocket by one tooth it takes HALF as many degrees of rotation of the cam as it would of the crank to move that one tooth.

 

[mesjeff]

Hey guys has any one considered that the alignment pin on the camshaft may have sheared off or even worse the woodruff key that aligns the flywheel with TDC may have sheared off . Though it a rarely happens now and then over the years i have gotten hold of some really badly abused bikes , and one would think this would happen on the sport quad end than the utility quad end but ive seen both happen a few times especially on the old Big Reds , and maybe a couple times on Big Bears , Grizzleys , the higher torque full time 4x4 hogs that werent geared for speed but for pulling power and climbing hills . This is only my thoughts , i have 2 teen aged boys , one is the typical millennial who would rather play video games and sleep , and wears a hoodie all day everyday . The other .........well ......... i guess i dug my toes in good the night he was created coz he could pass for my twin from the day he was titled and and we got his bill of sale (birth certificate) up until the point where pics of me get few and far between . i mean its almost scary . im old enough that i remember picture day at school and young enough to have a living mother who kept everything over the years and even our school pics are shockingly identical but he , very much me when i was coming up anything he does is done full send , WOT , FLAT TO THE MAT , balls out with his head on fire and wont nothing change that . Several years ago his blaster would get stuck on a path down to a dear blind we use and after having to get up on some cold mornings i suggested taking my 350 big bear 4x4 and try it . Well that evening it was everything from too big , to felt like it was gonna tip over , to too loud and way TOO SLOW , so i told him yea but u made it back and forth without waking me up or making me get up from my beer drinking chair and after work entertainment to come drag him out of a ankle deep mud hole . About the 3rd or 4th day is when i heard him pull back up and fly in the back door with what had to be the biggest 8 point buck ive ever seen and his 1st ever " yea dad i seen him and im gonna get him kill " . To shorten the story quite a bit in his youngness and like me ness he had been being pretty hard , either from lack of knowledge or sheer dont give a ........you know what , but he had been trying to rip back and forth on my BB like he did on his Blaster and some how the keyway had sheared off on the crankshaft and this sounds just  like my situation trying to get it fixed for over a month , taking it apart and putting it back together taking it apart and putting it back together , teaching him how to take it apart and put it back together and almost giving it to someone to get it out of the way . Our neighbor , and his teenaged son found it , both our sons put it back together , and a broken rear pinion gear shaft , a head gasket , exhaust upgrades , etc , the Big B

 

[Fish0rDie]

Saving this for later if I get to this point, because I'm sure to have issues. Thank you @Mech for the detailed explanation.