Lafytafy

I found it and adjusted them properly it was just hard to see it. Thanks guys!!

I have removed the front plastics and the speedometer and I'm able to get to both intake and exhaust but I don't see a T anywhere from the inspection hole no matter how many times I pull it over. The T shows when the engine is at TDC and I just can't see the T stamped on the flywheel. Help me please.

Is there another way to adjust the valves on my quad because I am unable to fit my hands between the frame to properly adjust the valves. I have the service manual but I don't want to remove the engine from the bike. Can somebody help me? Thanks!

I found the problem!! The shift linkage was worn out and it was traveling to far and slapping the case. Thanks for the help ya'll. 

Is there any other sort of adjustment i can do without taking the engine out? Thanks!

Near the front sprocket?

16 hours ago, Mech said:

Well the noise you are hearing may be the gears inside the gearbox banging together because the two gears are spinning at different revs.

If you blip the throttle just enough to bring the engine gear up to the revs it's going to need to be at to engage the new lower gear you are changing down to, It may stop that noise.

I think you need to try that and see if it lessens the noise. The noise could be in a diff, or an axle, or the gearbox. If we eliminate the gearbox gears clashing it would be a good first step to diagnosing the noise..

The exact procedure if you are slowing down is you let the throttle off till the speed gets low enough to shift down a gear, then give the throttle a small  blip to raise the revs just at the instant you are moving the shift lever down, then let the throttle off to continue slowing down. If you are shifting down to tackle a hill then you have the throttle open as you approach the hill, then just as you are about to move the shift lever, but before you move it, you let the throttle off slightly to take the load off the gears you are in so they can slide apart easily, then just as you move the shift lever you give the throttle a blip so it raises the engine revs enough that it will be at the revs it should be for then new lower gear you are selecting. All these small throttlings on and off are done in milliseconds and it's critical they are timed right, and that the amount of throttle is just enough..  It's worth practicing though because in makes the bike last longer, increases your traction control and so riding skills and abilities.

Bikes and quads are not like modern cars or trucks or even tractors. They use really simple old gears and need user input to get the best out of them.

It can't be the gears because it sounds like a shifter linkage or something is slapping the right side casing. I know it is something to do with something hitting the casing though but can someone help me out with figuring out what is hitting the case? Thanks!

13 hours ago, Mech said:

Do you blip the throttle as you downshift ? 

no i shift it like normal and i dont abuse the heck out of it either

Okay cool thanks guys!!

Does anybody know which Mikuni carburetor is on an 87 quadrunner 300. Thanks!

18 hours ago, Gwbarm said:

I think the first thing I would look at are loose or worn shift linkages, they can be adjusted, the manual tells you exactly how much play you need, im not sure on your model.

How and where do I adjust them?

When ever i down shift from any gear, it makes a singular loud click or knock and I don't know what it could be. Anybody have any idea

I will try that. Thanks Mech

On 5/2/2023 at 4:44 PM, Mech said:

If you find the reverse switche's connector, disconnect it, and then either test the operation of the switch with an ohm gauge, or, use a wire to short the wiring connector on the loom which should make the light come on..  That's how to confirm or eliminate the switch as the culprit.

You should check the reverse lever is traveling full travel down on the case, perhaps disconnecting the cable and moving the lever by hand.

I tried what you said and it didn't work. Could it be that the switch isn't getting power to it? I took a wire and touched it to the neutral switch connector and touched the other end to the reverse light wire and the light came on. So could it be that the reverse switch has a loose connection and is not getting power to it? Thanks!

On 5/2/2023 at 4:44 PM, Mech said:

If you find the reverse switche's connector, disconnect it, and then either test the operation of the switch with an ohm gauge, or, use a wire to short the wiring connector on the loom which should make the light come on..  That's how to confirm or eliminate the switch as the culprit.

You should check the reverse lever is traveling full travel down on the case, perhaps disconnecting the cable and moving the lever by hand.

Ah ok, I will try these when I get home today. Thanks!!

i need some ideas so i dont just buy something not knowing if it will fit.

you can find a lot of oem parts on partzilla or ebay thats how  get mine

my rear suspension is trashed and i dont know what to replace it with

what are the setting you have on the carburetor?

On my Suzuki, the muffler is very thin and I have tried to weld a patch over the holes but I just melted the metal. my welder is cranked all the way down but still, I have no luck. What do I do?

When i downshift from any gear while its running it makes a single loud click noise. Is this normal? If not, how do i fix this.

22 hours ago, Lafytafy said:

When my quad is shifted into reverse, the light on the speedometer doesn't come on. I've dug into the wiring and can't find anything other than it being a faulty switch. How do I get to this switch, is there a way to take it off without tearing it apart? I see that it may be accessible if I take off the air box but I am unsure of this. Thanks!

I have checked the bulb and it is fine I just don't know if there are any other ways of making sure before I tear into my quad.

When my quad is shifted into reverse, the light on the speedometer doesn't come on. I've dug into the wiring and can't find anything other than it being a faulty switch. How do I get to this switch, is there a way to take it off without tearing it apart? I see that it may be accessible if I take off the air box but I am unsure of this. Thanks!

should i run a thicker oil in a older quad because it make a little more noise than usual 

i need a trustworthy website for parts. Thanks!