Timing on a 1988 suzuki quadrunner lt4wd 250

[timberwolf357]

I've got an 88 suzuki quadrunner lt4wd 250 . I'm rebuilding the top end and can't find anywhere how to set the timing. Does anyone know where I can find this information or know how to set it ?

[MarkinAR]

Take the inspection bolt out of the left side of the case so you can see the timing marks on the flywheel.  Line the timing mark with the indicator inside that opening.  The cam should have dots or some type of mark on them that you line with the head.

[timberwolf357]

I believe the cam does , thank you. I'll give it a try.

[Mech]

The marks are on the sprocket I think. The cam needs to have the sprocket dowel at about the eleven oclock position, then you turn it till the sprocket marks are level with the head surface.

[timberwolf357]

Thank you, I havent got to it yet. I won't get to it till the weekend.

[Hammer_guy35]

I just changed the stator on my 1998 Suzuki 250 quad and now it wont start.  I am also looking for a way to check or adjust timing but cant find anything in my manual.  The stator only went on one way so not sure what could be off now.  Any  ideas would be very helpful and appreciated.

[timberwolf357]

there are 2 dashes on the camshaft, i lined them up even with the head and had the timing mark lined up in the inspection hole on the crankcase.

[Hammer_guy35]

I could use the marks to set the timing if everything was taking apart. I was wondering if there was a way to adjust the timing without taking everything apart.  I was able to get the Quad running, the problem was a bad connection from the new Stator Wire to the existing plastic connection. The new part had a slightly different connection and wasnt making proper contact. I cut off the old Stator connectors and spliced them to the new wires and everything worked fine except my quad is still running the same. Starts and idles fine but has no power and the engine seems to misfire when I try to give it gas. 

[Curtis Underwood]

Not easy to set timing without the bottom cover and cam covers off but yes I have done it before. I do no recoment doing this because you might or might not get it right. First determine if the timing is off by lining the marks up. If they are off in either direction by one or more cam shaft chain links then it is out of time. You then determine witch way you need to move the timing and turn the crank until the marks on the crank lines up. Remove the timing chain tensioner so you have slack in the timing chain. Remove the cam sprocket slip chain over sprocket until marks line up while keeping the chain tight on the side opposite of the tensioner side then turn the cam to the position where the sprocket will line up with cam and mount sprocket back to cam then replace tensioner(The tensoiner can affect the time when setting if your chain is worn) and check to make sure it is in time. Repeat this if it is not in time. Like I said it is not easy to do.
There is many things that can cause this other than timing.
1. Fuel air mixture is off. Bad or misadjusted carb.
2. Valves set to tight.
3 Airfilter not connected (has to be installed for machine to run correctly.)
4. Bad spark plug
5. Bad coil (not firing hot enough)
6. Bad CDI module (Ignition module)
7. Timing off one notch.
8. Stator ignition sensor not positioned in correct position(most unlikely unless an after market stator was used and it positioned wrong from factory)
9. Cam worn not opening valves enough.
10 Exaust system clogged not allowing proper exaust.
11 low compression.

So understand it is hard to say just what the problem is so trial and error is the only method you have of detemining what the probelm is.

[Curtis Underwood]

On 4/16/2022 at 12:54 PM, timberwolf357 said:

here are 2 dashes on the camshaft, i lined them up even with the head and had the timing mark lined up in the inspection hole on the crankcase.

Since they show from what you say then it is in time.