Clutch Adjustment - Thought I'd Share
#1
Clutch Adjustment - Thought I'd Share
Thought I'd share this, found it another site. Probaly the best write up I've read when it comes to #clutch adjustment.
The manual says 1/2 - 1 turn at the clutch pak, some techs say 1/4 turn.
Alot of folks have often asked whats the difference between that 1/2 turn opposed to a full turn.
This should shed light on the adjustments.
At the clutch pack: The adjustment of the nut in the clutch pack alters where the friction zone ends up on the lever on the bars, i.e., clutch lever engages close to the hand grip or almost all the way released from the hand grip. The clutch adjuster screw adjusts the point at which the cable begins to pull the clutch out of engagement. If you turn the clutch adjuster screw clockwise, you adjust toward slippage, if you turn it counterclockwise, you increase the slack before disengagement (drag). If the adjustment screw is turned too far clockwise, the clutch will be disengaged or slip no matter what position the cable is in. If the adjustment screw is too far counterclockwise, the clutch will drag because you cannot, regardless of how much slack you remove at the lever, disengage it enough to remove the contact.
The service manual recommends 1/2 to 1 counter clockwise turn after turning the adjuster screw clockwise to lightly seat the screw.
Following the the procedures in the service manual, with 1/2 turn counter clockwise the clutch will engage further from handgrip as you release the lever. Turning adjusting screw 1 turn, you will feel the clutch engages closer to the handgrip as you release the lever.
1/8 to 1/4 turn of the adjusting screw reduces your friction zone, clutch lever almost all the way out from handgrip before clutch engages.
1/2 turn is the stock adjustment, which is just fine for most riders, insures friction disc separation, clutch disengagement - which provides smooth shifting and finding neutral.
3/4 to 1 full turn, the clutch lever releases close to the grip. May not give you good separation of the discs resulting in difficult shifting, creeping of the bike in gear, harder finding neutral and faster clutch disc wear.
A motor officer will have their clutch adjustment screw turned 3/4 to 1 full turn from being lightly seated to have their friction zone begin close to the handgrip during their rodeo exhibitions.
In effect when turning the clutch adjustment screw; you are adjusting the push tube and setting where the ball and ramps start to disengage the clutch. The release bearing is also known as the throw out bearing (on right side of bike). When you pull in your clutch lever you are compressing the clutch springs allowing the clutch plates to disengage. Imagine a rod (pushrod) pushing on something that is spinning - if there wasn't a bearing (throw out) the rod wouldn't last too long.
At the lever: Use the cable adjuster to increase / decrease slack at the hand lever to about 1/16" to 1/8". Too much slack and clutch may drag / too tight and clutch may slip. If free play between end of cable ferrule and clutch lever bracket is more than 1/8" at the handlebar, clutch may not fully disengage.
Most Harley Davidson lever positions are set at about 1/8" of clutch lever spacing. However, the best positioning of the lever is where it works best for you - as long as it still "works" or gives you the best control over the clutch's operation. There are boundaries you want to stay within. Do not adjust the lever too tight where it will slip, or too loose where it will not disengage all the way. Keep the lever clean and lubricated, including the lever pivot pin.
The manual says 1/2 - 1 turn at the clutch pak, some techs say 1/4 turn.
Alot of folks have often asked whats the difference between that 1/2 turn opposed to a full turn.
This should shed light on the adjustments.
At the clutch pack: The adjustment of the nut in the clutch pack alters where the friction zone ends up on the lever on the bars, i.e., clutch lever engages close to the hand grip or almost all the way released from the hand grip. The clutch adjuster screw adjusts the point at which the cable begins to pull the clutch out of engagement. If you turn the clutch adjuster screw clockwise, you adjust toward slippage, if you turn it counterclockwise, you increase the slack before disengagement (drag). If the adjustment screw is turned too far clockwise, the clutch will be disengaged or slip no matter what position the cable is in. If the adjustment screw is too far counterclockwise, the clutch will drag because you cannot, regardless of how much slack you remove at the lever, disengage it enough to remove the contact.
The service manual recommends 1/2 to 1 counter clockwise turn after turning the adjuster screw clockwise to lightly seat the screw.
Following the the procedures in the service manual, with 1/2 turn counter clockwise the clutch will engage further from handgrip as you release the lever. Turning adjusting screw 1 turn, you will feel the clutch engages closer to the handgrip as you release the lever.
1/8 to 1/4 turn of the adjusting screw reduces your friction zone, clutch lever almost all the way out from handgrip before clutch engages.
1/2 turn is the stock adjustment, which is just fine for most riders, insures friction disc separation, clutch disengagement - which provides smooth shifting and finding neutral.
3/4 to 1 full turn, the clutch lever releases close to the grip. May not give you good separation of the discs resulting in difficult shifting, creeping of the bike in gear, harder finding neutral and faster clutch disc wear.
A motor officer will have their clutch adjustment screw turned 3/4 to 1 full turn from being lightly seated to have their friction zone begin close to the handgrip during their rodeo exhibitions.
In effect when turning the clutch adjustment screw; you are adjusting the push tube and setting where the ball and ramps start to disengage the clutch. The release bearing is also known as the throw out bearing (on right side of bike). When you pull in your clutch lever you are compressing the clutch springs allowing the clutch plates to disengage. Imagine a rod (pushrod) pushing on something that is spinning - if there wasn't a bearing (throw out) the rod wouldn't last too long.
At the lever: Use the cable adjuster to increase / decrease slack at the hand lever to about 1/16" to 1/8". Too much slack and clutch may drag / too tight and clutch may slip. If free play between end of cable ferrule and clutch lever bracket is more than 1/8" at the handlebar, clutch may not fully disengage.
Most Harley Davidson lever positions are set at about 1/8" of clutch lever spacing. However, the best positioning of the lever is where it works best for you - as long as it still "works" or gives you the best control over the clutch's operation. There are boundaries you want to stay within. Do not adjust the lever too tight where it will slip, or too loose where it will not disengage all the way. Keep the lever clean and lubricated, including the lever pivot pin.
Last edited by Tampa Fatboy; 05-14-2016 at 09:02 AM. Reason: added hashtag
The following 25 users liked this post by Tampa Fatboy:
1LargeDog (04-17-2019),
Bikeagraman (05-15-2016),
Bobjv (07-06-2022),
brother.beck (03-31-2023),
Cajun4x4 (03-31-2023),
and 20 others liked this post.
#2
That's a good explanation, transmissions get blamed a lot for dragging clutchs. Stiff shifting and trouble finding neutral are both good indicators of a dragging clutch. Trouble finding neutral is easily diagnosed. If you can't find it with the bike running but you can find with the bike shut off then your clutch is dragging.
While on the subject there is also the factor of grips. We have seen cases where the clutch is adjusted around the 1 full turn and the customer is using "fat" grips or leather covers and it limits the travel of the push rod. If you are using fat grips or grip covers I would advise backing your adjuster off at 1/2 turn or less so the clutch disengages farther out away from the grip.
Mine is set at about a 1/4 turn maybe less it engages almost all the way out. I'm running our 9 plate clutch that has no damper so it's a real neck breaker. I have to be real smooth with a passenger.
While on the subject there is also the factor of grips. We have seen cases where the clutch is adjusted around the 1 full turn and the customer is using "fat" grips or leather covers and it limits the travel of the push rod. If you are using fat grips or grip covers I would advise backing your adjuster off at 1/2 turn or less so the clutch disengages farther out away from the grip.
Mine is set at about a 1/4 turn maybe less it engages almost all the way out. I'm running our 9 plate clutch that has no damper so it's a real neck breaker. I have to be real smooth with a passenger.
Last edited by ChickinOnaChain; 09-04-2018 at 12:39 PM. Reason: Multiple posts
The following users liked this post:
splattttttt (08-25-2018)
#3
#4
The following users liked this post:
user 78379347 (07-23-2019)
#6
Join Date: Jan 2015
Location: Sandy Eggo's North County
Posts: 14,592
Received 5,387 Likes
on
2,951 Posts
The following users liked this post:
dayne66 (11-14-2020)
#7
Very useful read indeed TF.
On the wife's sporty I allow the clutch to dis-engage at the farthest release point of the lever which allows her to keep pinky, ring, birdie finger and thumb on the grip while index finger's on the lever due to her tiny hands and lack of experience.
I'll allow for more drag progressively as her experience level increases.
When I road raced as a kid, I liked it all the way out. Made power shifting quicker. Not something I need on the street.
Thanks for the write up man.
On the wife's sporty I allow the clutch to dis-engage at the farthest release point of the lever which allows her to keep pinky, ring, birdie finger and thumb on the grip while index finger's on the lever due to her tiny hands and lack of experience.
I'll allow for more drag progressively as her experience level increases.
When I road raced as a kid, I liked it all the way out. Made power shifting quicker. Not something I need on the street.
Thanks for the write up man.
Trending Topics
#9
More than 1 turn out and clutch wont engage at all. Basically going nowhere.
#10