Posts
37
Joined
4/13/2024
Location
Middlebourne, WV
US
2016 yz250x (BRC yzm500)
Having issue with my front brake and throttle assembly placement. If I roll my lever back to where is comfortable my throttle is twisted back so far it gives stupid arm just trying to give us some gas or vice versa the brake so far forward I’m having reach for it. I’ll add a picture and you can see where the throttle cable hits the master cylinder. Does anyone have a fix for this? After market throttle assembly or something 
Loosen the screws and rotate the throttle body back...
I'd try sliding the brake lever in, that'll give you a few extra mm of clearance between the reservoir and throttle cable.
If it still doesn't feel right, then I'd try replacing the throttle cable and throttle tube. The cables get resistance and slop as they get worn, and lock on grip throttle cams can be a little weird too.
As stated in the post if I roll the throttle back it makes it a pain to twist while riding and gives arm pump. Has me looking like Ronnie Mac trying to twist the throttle
Due to the Mika bars they don’t taper down until right at where the brake perch is now so I can’t slide it in any further. I was hoping for some aftermarket suggestions for throttle bodies that would offset it from the master cylinder
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The rotational orientation of the throttle housing is irrelevant to the operation of the throttle. It functions exactly the same no matter how far back you rotate it. It does not cause you to look like Ronnie Mac.
That is true, but the fully closed position has an impact on your wrist and arm position in many situations.
As stated above….It doesn’t matter if the throttle is rotated all the way forward or 90 degrees backwards it’s still the same amount of rotation as sad above(I’ve dealt with this with riders thinking if the throttle is rolled forward you don’t have to twist it as far). Take a marker and make a line on the edge of grip at 12 o clock. Turn throttle to wide open and see where line stops. No loosen and rotate throttle housing back away from the brake lever and do the same thing. It doesn’t matter how it is set up, a 1/4 or 1/3 turn throttle is the same amount of turning no matter the position the housing is tightened on the bar.
The amount of rotation is the same regardless of the throttle assembly position. Try using a razor blade to cut the ribs off the first row of the grip so that your fingers are in a familiar position when the assembly is rolled back.
You're right that the distance of rotation doesn't change, it's always going to be roughly 90 degress or whatever it is.
However, by rotating the throttle housing on the bar, you are changing the start and end points on for the 90 degree range. This influences rider wrist/hand angle in certain riding situations.
If throttle pull is 90 degrees, then starting at 12, 3, 6, or 9 will all be the same feeling. Just like starting at (1, 4, 7, or 10) will all be the same,
But! Starting at (1,4,7,10) will require the hand further forward/up for the same throttle % compared to (12,3,6,9).
Still No. lol You could mount the entire throttle assembly completely upside down and it won't change a thing. There is no "Start and stop point". It's rotational... it rotates 90 out of the 360 in a circle which is irrelevant to where in that 360 it is placed and has zero influence on hand, wrist, arm placement or any of that. If what you are saying was true, the mechanics would be rotating the tires on the starting grate to account for the "Start point" of the Dunlop stickers on the tires for the best holeshot.🤔
Tires rotate the full 360 degrees, the throttle only rotates ~90 degrees.
Yes completely upside down (180 degree change) wouldn't have an impact if the throttle pull is 90 degrees.
However, try this, rotate the throttle housing so it's closer towards the rider but not quite 90 degrees / 9 o clock.
What happens when the rider twists the throttle to full open? They'll have to get their elbow under the handlebar.
Once rotated to 90 degrees or 9 oclock, it'll be the same as starting from 0, or 180, or 270 (if the pull is 90 degrees).
Thumb throttle 😂…I have a similar issue with my KtM, with my bar bend, the front brake banjo bolt hits the handlebar in the position I prefer my lever, is what it is….I also like my throttle rolled as far forward as possible, Does not change the rotation of throttle but it changes the point at which the throttle stops rotation…but if you are using the proper grip..I.E. opening a door knob, should not make too much of a difference…
I’m glad you’re understanding one what I am saying. That’s the issue if I roll it back the starting point is so far back by the time I twist my arm is so far down it’s uncomfortable
Yes but if I roll it back my starting point is further down so therefore to get a full twist it would further back as well and that’s where your elbow drops and it gets uncomfortable
I mean I can roll it back and take a video showing that it does in comparison to being where it needs to be. If you roll it back the starting point is also rolled back, so therefore what would be full throttle is also rolled back. You have 90% of throttle if it’s sitting at let’s call it 0% at the top and 180% and the bottom if you roll it back to 30% your ending point would be at 120% rather than 90% in you’re 360 degrees of rotation
Yeah I don’t think anyone else is understanding that it’s the point at the throttle stops is where my issue lies
Take off your throttle tube and re-key your cable holder thingy on your lock-on grips so your grip is in your preferred position after you rotate the throttle assembly back. Makes zero difference where the throttle tube is positioned.
Assuming you grip the throttle at the same starting point it will still have the 90 degree ending point.
What you are saying is if you turn the throttle housing back you are starting with your hand/elbow in a different spot. As said above I will post a video if needed…..
No matter which way the throttle housing is mounted back more, or forward more it’s still a 90 degree rotation. Unless you are worried about say where your 1/2 waffle on your grips is oriented for your relationship to your hand. In that case you would need to install your grip differently.
Pit Row
Perfect answer!
The position of your hand on the grip determines the start and stop of the throttle when riding hence the re-gripping technique. As said above if it's a lock on and you can turn the grip on the cam even better! Rotate the grip forward, rotate the throttle assembly back and test it for yourself!
Your hand position on the grip is the answer. If the centre line of your palm starts above the throttle start position, it will finish above the throttle stop position when rotated or vice versa so the position of your hand on the grip dictates the opening and closing position. Heard of re-gripping? If your coming up to a fast section you rotate your hand further forward on the throttle grip so that you can be at full throttle in a neutral wrist position. Go in the shed and test for yourself, it's very obvious.
It’s like you are holding on to the throttle when you move it, or remembering your hand position on the grip - (As someone said:ribs on the grip?)
The “Start position” is where you first grip the throttle. Unaffected by where the housing is located.
I sure hope you guys are just trying to troll us and don't actually believe that the position your throttle housing is bolted to the bars has any effect on your hand position or the "start and stop points" of your throttle rotation.... 😅 The ribs or pattern of the grip are completely irrelevant and a totally different subject. They are not constrained or dictated by the position you mount your throttle housing.
Hold on.. gotta go check my blinker fluid in my car....
This has been bugging me so I went out and tested. I will admit I was wrong. I still don't understand why it bothered me so much when I went riding (first ride on this bike) but I made adjustments and thought it made it better so maybe it was just mind games at that point.
I have also been on bikes forever and never had an issues so it’s just my ignorance to blame. Maybe it’s just the way this bike is made and I’m not a fan of it. Further riding will tell.
Also sorry to the others who told me I was wrong and I didn’t believe
I went to the garage tonight and it looks like you guys are right.
The only thing I can think of is cable tension was different with the throttle housing rotated 🤷
Glad it got sorted. The funny thing is if you ran full diamond grips with no ridges or full waffle grips you wouldn't have been able to tell the difference. Your years of riding have trained your hand to like the half waffle grip in a certain position to your fingers.
I always sping my throttle housing on a new bike a full 360 forwards on the bars, gives me double the horse power at no extra cost 😉
Do you use a shorter throttle cable for a faster throttle response?
I’ve always ran waffles so maybe that’s what it was
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