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Engine cut off today
- Thread starter easyrider
- Start date
Need to post more information if you want a decent suggestion. What bike, how many kms, was the bike siting awhile, what have you done already, etc. etc.?
Spark, air, fuel, compression. 99% of issues involve one of those. in your case it sounds like the bike has compression and spark if it was running. lack of fuel or air may be your starting point.
Spark, air, fuel, compression. 99% of issues involve one of those. in your case it sounds like the bike has compression and spark if it was running. lack of fuel or air may be your starting point.
Trials
Well-known member
How bad is the air filter, test the compression, if compression is low check valve clearance, water anywhere it shouldn't be?
Is fuel injected yes? should work on every compression stroke just like a spark plug, is not hit and miss like a carburetor.
If in doubt, pull one injector, leave it hooked up and turn the engine over 3 or 4 revolutions (obviously an explosion hazard so be careful not to be messing with a spark plug or smoking at the same time) if no gas sprays check the fuel filter next, it will have one probably inside the fuel tank would be my guess.
stock or modified intake mappings or exhaust?
... could not locate a free oem service manual otherwise I would check their trouble-shooting section.
Is fuel injected yes? should work on every compression stroke just like a spark plug, is not hit and miss like a carburetor.
If in doubt, pull one injector, leave it hooked up and turn the engine over 3 or 4 revolutions (obviously an explosion hazard so be careful not to be messing with a spark plug or smoking at the same time) if no gas sprays check the fuel filter next, it will have one probably inside the fuel tank would be my guess.
stock or modified intake mappings or exhaust?
... could not locate a free oem service manual otherwise I would check their trouble-shooting section.
I would be amazed if an air filter caused you bike to cut out. At worst it would limit the power at high rpm and large throttle opening.
When was the last time you got gas? Water in the tank could give you your symptoms. Otherwise, you can start testing to find the cylinder with a problem (easy first test is a wet rag against each header while it is running to make sure they are all hot, then move on to compression/leakdown/spark/valves/injection if you want to dig further). Even if one cylinder quit firing, it wouldn't normally die, just run like crap.
When was the last time you got gas? Water in the tank could give you your symptoms. Otherwise, you can start testing to find the cylinder with a problem (easy first test is a wet rag against each header while it is running to make sure they are all hot, then move on to compression/leakdown/spark/valves/injection if you want to dig further). Even if one cylinder quit firing, it wouldn't normally die, just run like crap.
Trials
Well-known member
I have been seeing valve clearance issues happen after about 5 years service, no idea how many miles that works out to on a trials bike, I think you would need to measure valve train wear in hours. My cam rides on roller bearings, your twin cam probably rides on oil pressure and metal to metal where the valves contact the cam. It takes a lot more energy to drive yours so stretch on the cam drive chain will likely be more significant, which ever so slightly retards your valve timing.
Valve clearance has an adjustment tolerance of +/- one thou which is not very much.
Symptom is harder to start, it will cough out and die on you soon after you start up and take off. The overall performance loss is so gradual you don't really notice it until you make the adjustment, then you might notice a perceivable performance improvement.
@frekeyguy gets great reviews and is in brampton. No idea if you want a brick amd mortar shop
Iceman
Well-known member
You can pm him on this site, Frekeyguy. You can also contact him through his Fb page Motomechto.
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boyoboy
Well-known member
when you say you coaxed the bike home, can you be more specific on how it ran? and the issues of how it ran?
check the easy stuff first
pull the spark plugs and have a look/see EDIT- I like the suggestion (earlier from greyghost) of checking for heat in each of the header pipes - if it is difficult to get at the plugs
check standing voltage of battery
check running voltage
check the easy stuff first
pull the spark plugs and have a look/see EDIT- I like the suggestion (earlier from greyghost) of checking for heat in each of the header pipes - if it is difficult to get at the plugs
check standing voltage of battery
check running voltage
Last edited:
+1
I’d start with checking the battery. A battery unable to hold a charge or not receiving sufficient charge could cause the OPs symptoms
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