Does your bike jump when you put it in gear, also TB synch question

[default]

Ive never had a bike that did this, and ive never had a hydraulic clutch either. But when I shift from neutral to 1rst, the bike jumps forward a bit. Not so much I cant control it, but not unlike when you shift into gear without the clutch pulled in (minus the runaway bike and stalling)


I also wonder if there is any way to check to see if the throttle body screws have been messed with without taking the tank off? I can idle and the bike will run 8-9mph with no throttle input (with me on it) and ive read that happens when someone adjusts the air screws.

 

[Chuck B]

Lurch, clunk etc is completely normal with a wet clutch motorcycle. Several factures can make it less or more noticable. As for TB...your method of determination is new to me. Multi cylinder engines with separate carbs/TB need to be checked. That and setting CO made a huge difference on my S10.

 

[2daMax]

My S10 (2012), when engine is cold, N to 1st, extremely smooth, no clunks and hardly perceivable that it has entered 1st gear. When warm, a slight clunk.

me thinks your clutch has some adjustments required. Seems to me it is engaging slightly when the levers are fully pulled in.

 

[WJBertrand]

Maybe flush and bleed the clutch hydraulics just to see if it improves? Mine does it but it's not a big lurch. As others have said most wet clutch bikes do this.


-Jeff

 

[Gigitt]

15 SE with 9000km and gear click into 1st my lurch is very light.
as opposed to my Kawasaki Versys 650 which clunks and thunks and lurches and this normal for the Versys.

the only way to tell if someone has messed with the TB air screws is to do a TB sync.
From Factory the right side screw should be closed and painted white. left side is unscrewed and open.

 

[Juan]

Jumping when engaging first gear is absolutely normal on the S10. There are several threads on the subject in this forum.

 

[Madhatter]

a clunk and its in gear...something Harley riders are familiar with and its pretty normal for the s-10..... its a clunk not a clashing sound that something didn't mesh right...

 

[Checkswrecks]

+1 to normal to have a clunk. Until it's too much of a clunk, meaning you could have the clutch dragging due to a bent plate or other issue. If this is the case it will probably also be hard to get it to get in or out of neutral.


As for the throttle body screws, unless you have access to a boroscope it'd be hard to tell without lifting the tank. If you do have a horoscope available, the right screw is marked with paint at the factory and the paint seat will be broken. More info on throttle bodies is in the first thread here:
http://www.yamahasupertenere.com/index.php?board=78.0

 

[taskmaster86]

A clunk when the engine is cold is normal. To minimise it, pump the clutch a few times, then rev the engine a few times before you pull the clutch in again and then shift down to first. pumping the clutch and revving the engine will sling some oil around and minimise the clunk.

If those techniques don't work, I recommend you pressure bleed your clutch. Also make sure your oil level is correct and you are using the correct type of oil.

The throttle body screws can be seen through the gap between the frame and the bottom of the gas tank. The yamaha service manual actually tells you to do the throttle body synch without lifting the gas tank so it can be done, it is just cramped.

 

[ace50]

I've done these two things to minimize the 1st gear clunk.

1. Before you start the bike, put it in gear and with the clutch in, roll the bike back and forth some. Helps to loosen the dry clutch that has been sitting together with pressure on it. But who wants to do that all the time?
2. Just after a ride, put a clamp around the clutch lever to hold it down so while it sits, there is no pressure on the clutch plates.
That has worked for me the best, but I don't like to do it on a hyd. sys. vs a cable one, and it's just a temporary fix anyway. So I don't do it either anymore.

Oh I just thought of # 3...........Don't ride a Victory motorcycle! They are terrible on the shift into first!!! ::010::

 

[RCinNC]

+1 to normal to have a clunk. Until it's too much of a clunk, meaning you could have the clutch dragging due to a bent plate or other issue. If this is the case it will probably also be hard to get it to get in or out of neutral.


As for the throttle body screws, unless you have access to a boroscope it'd be hard to tell without lifting the tank. If you do have a horoscope available, the right screw is marked with paint at the factory and the paint seat will be broken. More info on throttle bodies is in the first thread here:
http://www.yamahasupertenere.com/index.php?board=78.0

It's weird that on my S10, the standard was on the left and not the right. Do you know why this might be? It seems like something that should be uniformly done at the factory, so why would some bikes have a different throttle body as the standard?

 

[Checkswrecks]

I typed this by memory, so may have been backward left/right-wise on which was painted. Cool that Taskmaster thinks the screws can be seen. I'll have to loot and mine at some point.

 

[Madscots]

All 3 of my S10's have done this ::008::

 

[Cycledude]

The clunk is normal on most bikes, my tenure clunk is about as mild as it gets, the worst clunkers I've ever seen are Harley Davidson

 

[RCinNC]

The clunk is normal on most bikes, my tenure clunk is about as mild as it gets, the worst clunkers I've ever seen are Harley Davidson

Amen to that. My Road King would clunk loud enough to be scary. My S10 only does it once in a while, and it's never as severe as the HD was.

 

[La Knee]

Bleed your clutch with quality brake fluid and remove and lube your shifter mechanism helped my bike out .GOOD LUCK

 

[rotortech71]

I agree on the clunk being normal. The quicker you go into first after the clutch lever is pulled, the more prominent the clunk will be. Try this; pull in the clutch, count slowly to 5, then shift to first. You'll feel the clunk much less, or not at all.

Any wet clutch bike I've owned has been like this.

 

[AVGeek]

I have a 2012 version, and mine has always clunked dropping into 1st. One thing i have found that helps lessen the effect is to blip the throttle with the clutch lever pulled in, and then drop it into 1st.

 

[HBLQRider]

Mine is either really smooth or I am just not paying attention.

 

[2daMax]

Mine is either really smooth or I am just not paying attention.

Just maybe....you got it confused with your scooter ???