Kuryakyn 6218 Motorcycle Handlebar Accessory: Premier Throttle/Cruise Assist, Universal Fit for Motorcycles with 7/8" and 1" Diameter Bars, Black, Pack of 1

I really love riding my 19 year-old Kawasaki Vulcan 88 (1500 cc V-Twin) through the East Texas back-road hills and forests. On a long ride, sometimes you really need to use your throttle hand to adjust clothing, gear, etc. -- or to just give it a little rest. The old Vulcan is a great bike, but it doesn't have some of the frills of the newer big cruisers - like cruise control, for example. When I saw the Kuryakyn throttle assist, I wasn't sure it would fit. But, I took a chance and ordered it and am glad I did.Installation took about 15 minutes.The first step was to loosen the two screws that hold the bike's front brake master cylinder and lever to the handlebar. The screws' heads are 'hidden' under little chrome caps - just gently pry them off with a small screw driver. This assembly needs to be shifted to the left about half an inch to make room for the throttle assist's clamp, which will clamp on the handle bar between the master cylinder and the start/kill switch assembly.The second step is to separate the two halves of the Kuryakyn clamp by removing the two retaining screws. I appreciated the fact that these are machine screws that mate into embedded metal nuts on the other half of the clamp. No cheap 'plastic on plastic' construction here. Thank you. Set the bottom half of the clamp and the two screws aside for now.Next, slip the large ring (the one with the chrome adjusting nut and engaging tab) over your throttle grip. Make sure to keep the 3 set screws pointing to the end of the throttle grip - it's easy to install this ring backwards if you're not paying attention (the way I did the first time).Position the throttle assist so that the handlebar clamp fits in the space created between the master cylinder and the start/kill switch. Put the bottom half on the clamp in place with the two screws and tighten everything up loosely.The next step was to select the included rubber bushing that best fit my throttle grip. Kuryakyn supplies three different sizes - large, medium, and small - which looks like will fit just about any size throttle grip out there. Plus, it looks like you could trim them, if needed. My Vulcan used the medium sized bushing.I then slipped the bushing over the throttle grip and into position within the large ring with the set screws. Pushed everything together for a nice snug fit and then screwed in the set screws so they were flush - this holds the bushing to the large ring securely - and the bushing is now nicely gripping the throttle grip.The final steps are adjusting the tension of the throttle assist when the thumb lever is engaged by tightening/loosening the small adjustment nut. And then, of course making sure everything is aligned and then tightening it all down (not forgetting the brake master cylinder / lever assembly).Then ride!I took it out for a little 120-mile ride afer installing, just to test it out. I love this device! It's simple, well made, and works great on my bike. It is easy to engage and disengage with gloves on or not. And, I like the fact that I can easily override the tension, even while it's engaged, by just using my hand as usual. It's also easy to 'adjust' my speed up or down while engaged by giving the grip a slight twist.Bottom line, it was affordable, well-made, and works great on my bike. Recommend without reservation to others with similar bikes.

It's pretty much what I expected. It's plastic, but doesn't feel cheap, or like it would break easily. It mounted right onto my 1" bars, but also included spacers/adapters for 7/8" bars. One of the included rubber spacers fit my grip well enough. I would have liked to use the thicker one, but it was just a little bit too tight to get it to work. The medium size one does the job though. I would have given 5 stars, but it took a little tweaking to get it working well. At first I couldn't really get it tight enough to hold and not let the throttle vibrate back down, and still be loose enough for the throttle to work freely when the lock wasn't engaged. I ended up stretching the little spring a little, so it opens up the locking "ring" more when not engaged. That worked. I've got it just right, so it holds the throttle without issue for miles and miles, but the throttle is still free and operates normally when not locked. I can also manually adjust the throttle when it's "locked" to fine tune my cruise speed, or if I need to quickly decelerate. (Why of why can't people see a motorcycle before pulling out? lol) Overall I'm pleased, and would buy it again. I think it needs a slightly longer spring to work best, but that takes all of 15 seconds to stretch the one included. Hence the 4 stars. ;) Well, Lets give it 4.5 stars. I can't so I'll be nice and round up... lol

I've had it for about 2 years now. Has not failed on me, or broke, and i have not had to adjust it after the initial installation.It's better than nothing. I have it installed on a 2003 V Star 100 Silverado, with ISO Grips. It slid on there, almost didn't fit. ISO grips are bigger than most stock grips.It does take some tweaking to get it to work well. It does slow down the return on the throttle, and it does slip and does not hold very tight. But good enough to give your a few seconds,or longer to do what you need with your right hand. I don't think this would be usable for long distances, without having to make adjustments to the locked position of the throttle.BUT, it works good enough to give your hand a rest, and is well worth the money. The ability to lock the throttle, and rest your hand, or do what ever you need to with your right hand for a moment, is very very nice. Have not tried the ones that are $100+, this is the first of its kind i've ever used.It works well enough for the price, and i would recommend it to everyone. Being able to use your right hand for things, and allow your hand to rest to me sounds like a safety thing, and safety is key. Let me clarify why i think this is safer.... when you NEED to use your right hand, you have no choice but to roll off the throttle, and when your on the freeway, that means slowing down, and could get you rear-ended or similar incidents. And being able to relax your hand for a moment, allows your hand to not cramp up, and should help with your reflexes, with a hand that isn't cramped up.I would buy it again.