| Author |
Message |
    
Weshu87
| | Posted on Monday, May 15, 2006 - 12:16 am: | 
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my bike was purchased 2 years ago from the original owner he didnt ride it much and i bought it with 1400 miles on it. after about a month of owning it, it was leaking oil so i replaced the primary gasket and the leak stopped. ever since then its never ran the same. It back fires quite often, hard shifts or wont go into neutral, will start then when i let out the clutch it will stall and backfire. I did not drive it much last summer for some of these reasons they arent consistent and the bike will run fine half the time then start this crap any help would be appreciated i would love to have it up and running good for this summer. |
Mikej
| | Posted on Monday, May 15, 2006 - 08:15 am: |
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Always hard to diagnose a bike over the internet, but there are the usual suspects when it comes to trouble shooting:
1. Sidestand safety switch. Bypass it with a jumper or safety pin to see if that solves the issue. If it gets better then you have the option of replacing the switch, or doing what others of us do.
2. Check your primary chain tension. Too tight and it will be hard to shift, too loose and the chain hits the inside of the primary cover.
There are other things to check for, but start with these two. Somewhere in the carb section there is a general rule of thumb for jetting recommendations, you might look into that as well. Many of us M2 owners have richened up the jets a bit.
If you don't already own a service and parts manuals then I'd suggest getting a set. There are also some folks on the site here located in Ohio who might be near enough to offer some hands-on help in getting your bike sorted out. |
Reepicheep
| | Posted on Monday, May 15, 2006 - 08:47 am: |
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Good advice from Mike...
I don't think a leaking primary gasket (which was not unusual on an M2) would be related to the poor running, I expect both just happened to surface at around the same time. If you replace it with the new metal gaskets (either the factory or aftermarket ones) it should stay fixed.
I would not be at all suprised to hear a bike that old with that few miles is running badly... Thats a lot of time for gas to go to goo in the carb. Do the sidestand checks first (because they are easy) then start checking the carb. As Mike says, you probably want to spend the $8 to rejet it anyway, follow the instructions in the knowledge vault.
It's a good time to be thankful you have just one big simple carb instead of a bank of sewing machine bits. |
Hans
| | Posted on Monday, May 15, 2006 - 11:53 am: |
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Yes, that is the first idea: Goop in the carb.
However: I have this recent story:
I hired a gardening machine for a day: With a 4 stroke Honda engine: Normally absolutely reliable.
But this time: Difficult starting, no power, backfiring and stalling when I tried to engage the engine.
I was overthinking all the possible causes and difficult things and I called the shop.
No problem: The service man came along at once.
Till my amazement the only thing he did was: Swapping the plug for a new one.
But the engine ran like the firebrigade during the whole day, further.
I would never have thought that the old 2 stroker trick would have worked with a modern 4 stroke engine.
Hans |
Mikej
| | Posted on Monday, May 15, 2006 - 11:54 am: |
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hot primary lube leaking out and blowing/dripping onto the kickstand sensor switch
Might go ahead and throw in a fresh set of spark plugs, just in case, and carefully check the plug wires for worn parts where you might be getting intermittant shorting. |
Mikej
| | Posted on Monday, May 15, 2006 - 11:56 am: |
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Hans,
how'd you know I was typing that as you posted?  |
Hans
| | Posted on Monday, May 15, 2006 - 05:42 pm: |
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Ha, something else comes in mind.
How did you replace the primary gasket? Leaning the bike far over to facilitate the gasket resting in its place?
In that case you can have a stuck vent valve.
Pull the hose from the vent valve and try to blow some air into the tank. (Yes, your mouth will do)
If stuck, you can`t blow air through it into the gas tank. Then you need more pressure: For instance with a bicycle tire pump till the valve is free again.
Stuck vent valve gives alternating running normal, and running crap with stalling.
Bad shifting can be caused by an overfilled tranny: Fill with just enough oil to let the clutch plates touch the surface.
Mikej: Again in the air now?
Hans |
Mikej
| | Posted on Tuesday, May 16, 2006 - 01:06 pm: |
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Hans,
nope, hadn't thought of a plugged valve. That'd be one of those things that would be easily overlooked and only found after spending 50 hours and hundreds of dollars chasing other gremlins. |
Weshu87
| | Posted on Tuesday, May 16, 2006 - 08:45 pm: |
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thanks for all the help and the quick responses i am gonna get working on it some time later in the week thanks again. |
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2001 buell m2 problems