Curing handle bar vibration?
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- Posts: 8
- Joined: October 11th, 2007, 10:07 pm
- Location: Edmonton Alberta Canada
Curing handle bar vibration?
Hope this is the right section to post this question. I have set up my AFC for ice racing this winter 14/43 gearing is giving me 87 mph at the end of the 1/8 mile straight . My problem is the vibration through the bars, my hands are shot after 3 laps. My ? is how much do the Flexx bars reduce handlebar vibes? and any other suggestions to smooth this thing out woud be greatly appreciated.
2005 T2 CR500R
- teemtrubble
- Posts: 2269
- Joined: October 11th, 2007, 2:15 pm
- Location: simi valley, ca
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- Posts: 8
- Joined: October 11th, 2007, 10:07 pm
- Location: Edmonton Alberta Canada
I understand that but suck a little dirt in one time and you can kiss that fresh bottom end goodbye. 20 hours is more than enough time to eat a little dirt here and a little dirt there you know? Good OEM bearings are always a good place to start. I mean, if the motor vibrates too badly nothing you can bolt on is going to change that. Live with it the way it is...or it's bout time to split cases againbig_bore_500 wrote:Bottom end? Highly doubtful considering the motor has less 20 hours since being completly rebuilt. (meaning every bearing replaced) but thanks for the suggestion. Any others?
'03 CR500 powered by...umm...a new motor?
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from what ive seen, crank bearings typically last for many years if they dont get dirt in there and have good supply premix oil. with only 20hrs i highly doubt its bearings but its possible i suppose. bad clutch bearings could be part of the problem. another thing to look at is your chassis. you put a motor in there that aint supposed to be there. like putting a cr5 in qaud chassis, for some reason the vibes are horrible. i havent heard anyone complain about vibes with AF conversion but you have to expect those sort of problems when you mix and match parts that werent designed for each other. kind of like clearanceing the crankcase for the rear spring, and heat gunning the tank, and repositioning the radiator spouts, and changing coil location, and raising the Y, and using plexi glass to hold the airbox together
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i kind of agree because the cr5 does vibe alittle but if the vibration gets to the point of hurting your hands or arms there is definatly a problem somewhere. without seeing the bike its hard to say where the problem is. when i first bought my '00 steely it would make your hands numb after about 1 hour, i replaced every bearing and it fixed the problem. ya it still vibes alittle but you can ride it all day at glamis without hands going numbShanMan wrote:best way to cure the vibes is to ride a CR250R...LOL. Seriously though, the Flexxbars really do work, but are pretty pricey obviosly.
IF you are sitting down, you should be doing this anyway. Relax your grip on the bars and don't rely on your arms / hands. Use your core muscles (abs). You'll last a lot longer and be far more balanced.JBaze wrote:So I just learned how to hang on with my knees!
No longer have a CR500.
07 Yamaha YZ250, 17 Husqvarna 701 Enduro
Get on with riding or get on with dying.
https://www.youtube.com/mojoscojo
07 Yamaha YZ250, 17 Husqvarna 701 Enduro
Get on with riding or get on with dying.
https://www.youtube.com/mojoscojo
- redrocket190
- Posts: 1229
- Joined: September 17th, 2007, 9:07 pm
- Location: San Clemente, CA
You can fill the bars with silicone, sand or buy some inserts from Faast Company. Flex bars are there to serve a different purpose but they will damp out the vibration. Loosen your grip.
I recommend you ride an air-cooled 480/500 for 45 mins and then your bike will feel just fine. It's all relative.
I recommend you ride an air-cooled 480/500 for 45 mins and then your bike will feel just fine. It's all relative.
Michael Stiles
2007 Honda CR500R-AF
2007 Honda CR500R-AF
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- Joined: October 11th, 2007, 10:07 pm
- Location: Edmonton Alberta Canada
Am I right in thinking that the aluminum frame transfer more vibes than the steel frame does. No past experience, when i bought the '86 the motor was out before I ever rode it. Like to here some replies from the guys that have SMed their bikes to see if they are experiencing the same problems cause I know not to many dirt guys are running 14/43 gearing and doing 90 mph on a regular basis.
2005 T2 CR500R
- britincali
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- Location: Barstow, CA
big_bore_500 wrote: cause I know not to many dirt guys are running 14/43 gearing and doing 90 mph on a regular basis.
15/46 on my nitrous bike
I filled the bars on my AF with bathroom caulk (silicone) and it felt better.
Coolness list by 90cr500guy
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Bob's = 50/50
Cepek = cool
Solidbro = cool
Brit = loser
Stoffer = 1 up from Brit
MFDB = cool
Danny = ok
MojoScojo wrote:IF you are sitting down, you should be doing this anyway. Relax your grip on the bars and don't rely on your arms / hands. Use your core muscles (abs). You'll last a lot longer and be far more balanced.JBaze wrote:So I just learned how to hang on with my knees!
Years and years of Belfair singletrack taught me that one!
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Brit told me he liked his hands going numb.... its how he invented " The Stranger"...
http://www.urbandictionary.com/define.php?term=stranger
http://www.urbandictionary.com/define.php?term=stranger
for what's it worth, I do not believe a properly tuned 500 in an aluminum chassis will transmit more vibration than an equally prepared steelie. I thought all 500's shook hard until I rode AlisoBob's bike at Jawbone....as most of you know, he is a stickler for crisp jetting, etc. and that bike was flat out buttery...it wouldn't have mattered if was bolted into a Huffy.
That said, my last 500 had the bars filled with silica sand and the ends sealed with caulking, and it worked pretty well....worth the 1/2 lb. of sand. Probably the only time having sand on your caulk is a good thing.
That said, my last 500 had the bars filled with silica sand and the ends sealed with caulking, and it worked pretty well....worth the 1/2 lb. of sand. Probably the only time having sand on your caulk is a good thing.
CR500AC widget maker
- dannygraves
- Posts: 8020
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- Location: Las Vegas, NV
My gen-4 vibes like a SOB, but I know the cause, the rod bearing was a little lose, not enough for me to justify holding off on putting the motor together until I could buy a brand new crank (like I am doing for the gen-3) but enough to make the vibes a problem for any girly man who might ride my bike
my gen-1 doesn't vibe nearly as bad, but I still get the hands numb rollin' bowls at dumont. I also know whats wrong with that one... it has a hotrod kit which is fine, but I didn't realize until my last time having it apart that when my main bearings failed (sucked in sand) the crank journals wore down. I had the hotrod kid installed while I was replacing the mains and the crank slid back into the bearings w/o any resistance. So the crank is allowed to move just a little independently of the bearings and this causes my minor hand numbing.
the fact remains the crank is a big heavy off balance peice that rotates really fast... if you have a vibe problem, that is where you should look.
the cr500 is a freaken ass reliable SOB and will run with f-ed up parts for a long time, but that doesn't mean they don't have to be replaced.
my gen-1 doesn't vibe nearly as bad, but I still get the hands numb rollin' bowls at dumont. I also know whats wrong with that one... it has a hotrod kit which is fine, but I didn't realize until my last time having it apart that when my main bearings failed (sucked in sand) the crank journals wore down. I had the hotrod kid installed while I was replacing the mains and the crank slid back into the bearings w/o any resistance. So the crank is allowed to move just a little independently of the bearings and this causes my minor hand numbing.
the fact remains the crank is a big heavy off balance peice that rotates really fast... if you have a vibe problem, that is where you should look.
the cr500 is a freaken ass reliable SOB and will run with f-ed up parts for a long time, but that doesn't mean they don't have to be replaced.
'09 kx450f 4-Poke
Gen-4 trail bike --SOLD--
Gen-3 badass trail/mx bike --SOLD--
Gen-1 built dunes bike --SOLD--
'05 klx110 --SOLD--
'95 pw80
Gen-4 trail bike --SOLD--
Gen-3 badass trail/mx bike --SOLD--
Gen-1 built dunes bike --SOLD--
'05 klx110 --SOLD--
'95 pw80