need some advice on valve timing

[charlesnj6]

my grandson has a rocketa go cart 110 cc three speed forward and reverse, well the problem was he forgot to keep a check on the oil level and it got a little bit to low and the wrist pin got stuck due to a lack of lubrication. I found that out after it quit running and would not turn over so i took the head and cylinder off and that's what i found. Luckilly it was not to severe and i was able to unstick it and put a little oil on it and it seems fine. Now i need to find out how to time the overhead chain driven valves, i cant find any marks on the gears however i did mark the camshaft gear and the camshaft hub but the crankshaft gear you can not get to it. I put it back together with the piston on TDC and both valves closed but afraid to start it up because i'am not sure I have it right, can anyone help me out on this?

 

[Rotore]

Try it i doubt i will do any harm if timing is not right in most cases it will not start but on the off chance it does and is running like crap adjust it by small incriments.

And i guess you have an OHC Over Head Cam

 

[charlesnj6]

Rotore, thanks for the reply, just tried to start it and it wont start, it gonna big tough because i dont know what direction to go on tooth at a time.

 

[Kaptain Krunch]

It could do harm, if the timing is off enough and you go to start it (electric start?) you could easily bend a valve or worse. I couldn't find anything on setting the timing but maybe you could try emailing roketa themselves. http://www.roketa.com/index.shtml

 

[anderkart]

Is this your engine: http://ep.yimg.com/ca/I/yhst-4459889511773_2081_4438272
Maybe Roketa just copied (cloned) the design from Honda or some other manufacturer that would have some online info avalible to help you out.

 

[charlesnj6]

yes that's basicaly it. That's a great find!!!!

 

[charlesnj6]

It probaly is the same manufacturer.

 

[charlesnj6]

Kaption Krunch- it is electric start and it turns over like eeerrrrunhhh eeeerrrunhhh, sort of like a car engine that the dist. is to far advanced, I have to be very carfull the valves don't hit the piston so far that has'nt happened, it has real good compression when i put my finger on the spark plug hole.

 

[jr dragster T]

Typically you set the engine to TDC, Loosen the cam chain tensioner, and set the chain around the cam gear. Usually right on the edge of the cam gear near the teeth will be a mark at both sides which you would line up with the gasket surface with the rocket cover off. Both cam lobes should be facing away from the rocker arms at this point.

 

[charlesnj6]

I will give that a try. THANKS SO MUCH, THANKS TO EVERYBODY. I will let you all know how i make out.

 

[anderkart]

Hey Charles, check out the info at this link: http://forums.atvconnection.com/kid...29-honda-clone-110cc-timing-valve-timing.html

 

[charlesnj6]

Thanks guys, I checked the valve timing both ways with TYLER and ANDERCART'S method. I was surprised to find the valve timing was right on the money ( hard to beleive) it started and ran at idle speed for about 7 or 8 seconds and quit. I have spark, gas and compression but won't start or fire at all now. Any ideas will be greatly appreciated.

 

[anderkart]

Might as well double check your spark timing: http://www.google.com/search?source...nUS221US222&q=setting+timing+on+a+honda+110cc.

 

[charlesnj6]

Hey guys i'am making progress. After my grandson got home from school today i tried another idea and that was to get it to turn over faster so i put a car battery charger on and turned it to engine start and it started up and ran full throttle. At least i know it will run, now i just have find out why no idle, i think it could be the throttle control cable going in to the top of the carb. If you have any ideas let me know, again i would like to thank everybody for taking the time to help me out. That valve timing was a doozey.

 

[Rotore]

It could do harm, if the timing is off enough and you go to start it (electric start?) you could easily bend a valve or worse. I couldn't find anything on setting the timing but maybe you could try emailing roketa themselves. http://www.roketa.com/index.shtml

eah puñeta mala mia I was thinking about an L-head at the time

 

[charlesnj6]

I took the throttle cable off the carb., don't see anything wrong, any ideas why the engine would run at full throttle?

 

[anderkart]

Sounds like theres something in the carb thats hanging up and keeping the carbs slide (or butterfly if equiped) from fully closing back to the idle position. Look in through the carbs air cleaner end while operating the throttle, you should be able to see if the slide is fully moving all the way back down closing off nearly all the air flow and allowing your engine to idle. If theres something binding up the slide you'll need to find out why and corect it.

 

[charlesnj6]

OK I will check it out and thanks again for your help.

 

[charlesnj6]

ok and thanks again, i hope your getting my replys, i don't see them posted. Not to good at using these threads , don't understand all the directions.

 

[charlesnj6]

That's what is was, it is now running like normal, everything is good. I want to thank all you guys for your help as it would not be in operation without it. My grandson is very happy and so am i. I would like to wish everyonr a MERRY CHRISTMAS AND A HAPPY NEW YEAR!!!