Engine lag. 2012 48
Thread Starter
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4th Gear
Joined: May 2019
Posts: 8
Likes: 1
From: NC
Engine lag. 2012 48
I'm having this complicated problem that I can't seem to remedy by mapping my ECM.
When i twist the throttle, the bike runs normally in 1st and halfway normal in 2nd. There's a noticeable amount of lag in 3rd, worse in 4th, tremendously worse in 5th.
I twist the thottle, the engine revs, what sounds like too high (almost like I'm missing a gear but I'm not), then the engine catches up to the rev.
It's almost like the engine is lagging behind me twisting the throttle.
Before this, I didn't ride the bike for quite some time but when I did, it was fine.
This seemed to start when I finished doing maintenance on my bike ( oil change, primary oil change, clutch adjustment). The basic 5k service stuff but at 40k, which is the mileage that I did it at.
Also, it's hard to go over 60mph without twisting my throttle and it over-revs.
Any ideas?
When i twist the throttle, the bike runs normally in 1st and halfway normal in 2nd. There's a noticeable amount of lag in 3rd, worse in 4th, tremendously worse in 5th.
I twist the thottle, the engine revs, what sounds like too high (almost like I'm missing a gear but I'm not), then the engine catches up to the rev.
It's almost like the engine is lagging behind me twisting the throttle.
Before this, I didn't ride the bike for quite some time but when I did, it was fine.
This seemed to start when I finished doing maintenance on my bike ( oil change, primary oil change, clutch adjustment). The basic 5k service stuff but at 40k, which is the mileage that I did it at.
Also, it's hard to go over 60mph without twisting my throttle and it over-revs.
Any ideas?
Last edited by Doctorchill; May 11, 2019 at 11:25 PM.
Intermediate
Joined: Feb 2019
Posts: 39
Likes: 8
From: Illinois
I'm having this complicated problem that I can't seem to remedy by mapping my ECM.
When i twist the throttle, the bike runs normally in 1st and halfway normal in 2nd. There's a noticeable amount of lag in 3rd, worse in 4th, tremendously worse in 5th.
I twist the thottle, the engine revs, what sounds like too high (almost like I'm missing a gear but I'm not), then the engine catches up to the rev.
It's almost like the engine is lagging behind me twisting the throttle.
Before this, I didn't ride the bike for quite some time but when I did, it was fine.
This seemed to start when I finished doing maintenance on my bike ( oil change, primary oil change, clutch adjustment). The basic 5k service stuff but at 40k, which is the mileage that I did it at.
Also, it's hard to go over 60mph without twisting my throttle and it over-revs.
Any ideas?
When i twist the throttle, the bike runs normally in 1st and halfway normal in 2nd. There's a noticeable amount of lag in 3rd, worse in 4th, tremendously worse in 5th.
I twist the thottle, the engine revs, what sounds like too high (almost like I'm missing a gear but I'm not), then the engine catches up to the rev.
It's almost like the engine is lagging behind me twisting the throttle.
Before this, I didn't ride the bike for quite some time but when I did, it was fine.
This seemed to start when I finished doing maintenance on my bike ( oil change, primary oil change, clutch adjustment). The basic 5k service stuff but at 40k, which is the mileage that I did it at.
Also, it's hard to go over 60mph without twisting my throttle and it over-revs.
Any ideas?
Thread Starter
|
4th Gear
Joined: May 2019
Posts: 8
Likes: 1
From: NC
Hmm clutch plates? Now that u mentioned it, I'm thinking its an adjustment issue ( I adjust it too much or too little).
New problem: it shifts but doesn't move on the ground. Frustrating.
I put it on the Jack and the back wheel moves. The speedometer goes up then goes to zero.
New problem: it shifts but doesn't move on the ground. Frustrating.
I put it on the Jack and the back wheel moves. The speedometer goes up then goes to zero.
Intermediate
Joined: Feb 2019
Posts: 39
Likes: 8
From: Illinois
Hmm clutch plates? Now that u mentioned it, I'm thinking its an adjustment issue ( I adjust it too much or too little).
New problem: it shifts but doesn't move on the ground. Frustrating.
I put it on the Jack and the back wheel moves. The speedometer goes up then goes to zero.
New problem: it shifts but doesn't move on the ground. Frustrating.
I put it on the Jack and the back wheel moves. The speedometer goes up then goes to zero.
Thread Starter
|
4th Gear
Joined: May 2019
Posts: 8
Likes: 1
From: NC
I appreciate all of your help.
DUH question....
Should I go counter-clockwise to tighten the screw in the primary, or clockwise to loosen? I'm thinking loosen but don't want to loosen too much to make things fall out of whatever.
DUH question....
Should I go counter-clockwise to tighten the screw in the primary, or clockwise to loosen? I'm thinking loosen but don't want to loosen too much to make things fall out of whatever.
Thread Starter
|
4th Gear
Joined: May 2019
Posts: 8
Likes: 1
From: NC
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Intermediate
Joined: Feb 2019
Posts: 39
Likes: 8
From: Illinois
Take a look at this video, it might help to understand the mechanism behind the clutch. It is a good quick video (
).
Two ways to adjust the clutch, you can make minor adjustments down on the clutch cable where there is a lock nut. For more of an adjustment, you can go inside the clutch cover, which is what I think you are doing.
If your RPMs are increasing and you can shift, but no power to the tire...There could be two issues:
1. Your clutch plates are worn and when you release the clutch, the plates are not catching and are still spinning as if the clutch is engaged and then will not transfer power to the wheel. No adjustment will help in this case, as the plates are worn and will need to be replaced.
2. Your clutch is too tight right now causing the plates to be separated. When the clutch plates are separated, the power to the tire will stop (ex. Pulling the clutch in to shift gears.) Try to loosen the clutch and see what happens. Loosening it should allow the plates to seat and generate the friction needed to provide power to the tire.
Hopefully this makes sense and helps a little bit. How many miles are on the bike? Let me know if this works, it will probably take some guess and check. You should be able to adjust the clutch, then pull the clutch lever and see if it makes sense (ie. too little or too much freeplay).
Two ways to adjust the clutch, you can make minor adjustments down on the clutch cable where there is a lock nut. For more of an adjustment, you can go inside the clutch cover, which is what I think you are doing.
If your RPMs are increasing and you can shift, but no power to the tire...There could be two issues:
1. Your clutch plates are worn and when you release the clutch, the plates are not catching and are still spinning as if the clutch is engaged and then will not transfer power to the wheel. No adjustment will help in this case, as the plates are worn and will need to be replaced.
2. Your clutch is too tight right now causing the plates to be separated. When the clutch plates are separated, the power to the tire will stop (ex. Pulling the clutch in to shift gears.) Try to loosen the clutch and see what happens. Loosening it should allow the plates to seat and generate the friction needed to provide power to the tire.
Hopefully this makes sense and helps a little bit. How many miles are on the bike? Let me know if this works, it will probably take some guess and check. You should be able to adjust the clutch, then pull the clutch lever and see if it makes sense (ie. too little or too much freeplay).
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