Newbie here. Need help with my 94 vmax600

J

Jason R

New member
Joined
Oct 31, 2007
Messages
12
Age
53
Location
Michigan
Hi guys,
A friend gave me a 94 vmax 600. It had a bad cylinder. The pin that holds the rings in place let loose and destroyed the cylinder. Long story short I replaced both cylinders and pistons. I drained all old oil and fuel. cleaned and filled the tanks. Bled the oil lines. I pulled on it a few times and nothing. I do have fuel going to the carbs. I pulled the one of the plugs and just layed it on top of the head. I do have spark. It doesn't look really strong but I figured it wasn't getting a proper ground by just laying on the head. I sprayed a very little starting fluid thinking I'd at least get it to pop but nothing. I don't have a service manual for it but I seem to have fuel and spark but no fire.
Any ideas? I appreciate whatever you may have to offer.
 
pull

pull out your spark plugs and put a tea spoon full of gas down in each of the holes,put the plugs in as fast as you can hold the trottle wide open and it should fire up...
 
Thanks,
I'll give it a try when I get home tonight. I thought maybe timing but he said it ran fine before it grenaded and he didn't touch anything after.
 
You need four things to make it run. Spark, Fuel, Air, and compression. Now you either are short on one or not getting it at the proper time. My first thought was that the pistons were but in backwards.
 
I was at my buddys house last night and he was loading his machine with starting fluid to get it to start. He said "Oh yeah, Jay. You've gotta give em alot of the starting fluid to get them to start." I personally am scared of starting fluid. I don't like to use too much but maybe I'm not giving it enough. I'll try the fuel when I get home.
 
Jason R said:
I was at my buddys house last night and he was loading his machine with starting fluid to get it to start. He said "Oh yeah, Jay. You've gotta give em alot of the starting fluid to get them to start." I personally am scared of starting fluid. I don't like to use too much but maybe I'm not giving it enough. I'll try the fuel when I get home.
Click to expand...
i don't think i would use that stuff, some people say it's not good for your motor..it dries the cylinder walls or somthing like that
 
With my 600 I have to pour a little gas down each cylinder for the first start of the year. It should fire right up, may stall and have to repeat the procedure again but once it is running it should be good for the season. STAY AWAY FROM STARTING FLUID. It is to violent of a burn and can do damaged to your engine as well as it removes the oil from your cylinder walls.

If it still doesn't start check your compression, maybe your rings are on upside down.
 
No boogy

MIchigan is a BIG State. Where are you located ? There many guys out there willing to give a guy a hand. Me being one of them.

I have a few questions, Did you replace the cylinders with used or new ? Did you check the end gap of the rings prior to installing them ? Install a new base gasket ? Install a thinner head gasket ? Were the reeds damaged ?
 
Are your plugs wet when you pull them out? You know your getting gas to the cylinders then.
What is your cranking compression on a gauge?
Do you have the crankcase full of old stale fuel? That will exstinquish any bang from fresh fuel when it mixes in the chambers...
Do that "teaspoon of gas" thru the plug holes with the pistons at BDC (so it gets to the crankcase too), try new plugs. If it doesn't fire on that, then you have an ignition problem. Weak spark will not arc under compression...
If the sled sat exposed to any weather for any long period of time before you got it, your kill switch might be going bad. Try bypassing it.
No evidence of mice chewing on any wires?
Are your airbox and exhaust clear of any restrictions like a "mouse nests"?

Process of elimination...
 
SpartaSXr said:
MIchigan is a BIG State. Where are you located ? There many guys out there willing to give a guy a hand. Me being one of them.

I have a few questions, Did you replace the cylinders with used or new ? Did you check the end gap of the rings prior to installing them ? Install a new base gasket ? Install a thinner head gasket ? Were the reeds damaged ?
Click to expand...
Sparta I'm in Roseville. I had my old cylinders machined and sleeved. I installed all new gaskets. I did not check ring gap. Reeds look just fine. To me the spark looks pretty weak but I don't know for sure. I haven't had a chance to look at it in a few days but I'll get back at it this weekend. Thanks again for all of your help.
 
i hope you get it running if i was you i woulds just start with the little stuff first... just to get it out of the way.... like the kill switch, teaspoonin gas, and rats or what not.....
 
I guess if I'm going to do a compression test I should probably know what specs are. Anybody give me any insight? I guess I should buy a service manual but I just can't justify spending over $100.00 on a manual.
Thanks
 
Well, I don't know for sure what compression should be but I do know what I have is incorrect. I checked the left cylinder and have 58 psi the right cylinder is 65 psi. This steadys out after about 5 pulls.
What did I do wrong??
 
Did you hold the throttle wide open when you did the compression check? It will make a difference.

Later
 
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