Hey everyone,
I purchased a used '99 M750 in October that was dropped on both sides while it was parked. When I rode it I noticed that the throttle would not snap back, but it would slowly return to its closed position with a little help. It's basically a rigged cruise-control right now. I've been trying to figure out the best way to fix this issue, and am leery of trying to bed the tube back, I'm also praying that the handlebars aren't bent. I took a picture of what the throttle tube looks like right now, I'm considering buying the G2 Throttle Tamer to replace the current throttle, do you think this is the best move? Or should I the tube off and try to bend it back? Maybe I'm just completely off. Any feedback on what is causing the throttle not to return would be awesome, I also checked the throttle cables and they look fine, no fraying. Thanks for all your help in advance.
http://imgur.com/aOFthue (http://imgur.com/aOFthue)
If you have had the cable disconnected from the housing on the bars and checked it for free movement...
.... then you have/should have seen that the throttle cam is undamaged and rotates freely in the housing?
If ok at both points - then it's most likely the throttle tube not rotating on the bars = most likely bent bars. Not terribly expensive. http://www.monsterparts.com/pc/2351/Bars/2351.html (http://www.monsterparts.com/pc/2351/Bars/2351.html)
I have no experience with a throttle tamer. I went the other way - with a faster throttle.
I will disconnect the cable when I get back to Chicago this weekend and see if the tube moves freely, do you know if the stock tube is all plastic or if there is an aluminum/metal component to it? From my inspection, and the picture, it looks like the tube is actually metal and may have bent, which is what I'm hoping is the case. Regardless, thanks for your help!
Mine is plastic, but your picture shows metal, so ....
I wouldn't feel comfortable riding with a throttle tube or bars that were bent/bent back. If you're good at straightening metal tubes it doesn't hurt to try, but a predictable throttle is kind of important.
When the throttle housing is off, it's easy to remove the throttle tube to inspect both it and the bars.
If I recall correctly, the throttle tube on my '01 750 was plastic. IMO, a carbed 750 does not need a throttle tamer if it is tuned well. A new one should be about $50, new OEM bars about $100. You could post in "Parts Wanted" for used parts or check out our sponsors for different bars or clip-ons. My thought on the bars is if they were bent you would feel it.
Used Suburban Machinery bars here, kind of a compromise between clip-ons and handlebars.
Check the rubber grip isnt dragging on the throttle housing.
So, I had checked the rubber grip to see if it was catching on the bar-end, but this wasn't the issue. I was also thinking that if the bars were bent I would definitely be able to tell, I just don't know if the guy I bought this off had replaced the throttle tube with a metal one. I currently have clip-ons with the bike now, but if you look at the image in my original post, it looks like there is an aluminum component to the tube.
Lubing the throttle tube so it slips nicely on the bar helps. Moly grease is often used.
Push pull cables need to be set just so for the throttle not to stick or return too slowly. They are adjusted to balance the tension between them. It can take a bit of work to set them up correctly.
Quote from: koko64 on December 07, 2015, 06:18:58 AM
Push pull cables need to be set just so for the throttle not to stick or return too slowly. They are adjusted to balance the tension between them. It can take a bit of work to set them up correctly.
I had an issue like this recently. If the cables are adjusted too tight it can cause just what you describe. Easy to test.
Or if there is notably more play in one cable than the other.
Any luck?
(http://i.imgur.com/aOFthue.jpg)
I would suspect aftermarket aluminum throttle tube is bent.
I actually ended up buying a used M900 throttle from someone on the forum when I was travelling for work, I plan to put this one on this weekend. I will let you guys know if it works. I have a feeling that the previous owner put an aftermarket tube on, dropped it and bent it. The stock one is plastic so hopefully it will return properly.