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Old 11-24-2012, 03:27 AM   #1
PinkDawnCBR600
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Anyone ever heard of this happening? Help a woman out

Hey all. So I'm a new rider and I understand new riders usually wreck, but I think a serious mechanical problem caused my accident yesterday. So I bought this 1996 CBR 600 from a guy about a month ago. He said he had just changed out the spark plugs and that the bike rode fine. He also mentioned he never used to clutch to switch gears yadda yadda.

About 3 weeks ago after having it a couple weeks I was driving in 3rd gear and all of sudden the Bike started to slow and the Rpm's started going down for no reason. I wasn't braking and wasn't touching the clutch. It's like the bike had lost power to the throttle for some reason. I immediately grabbed the clutch and pulled off the road and came to a stop, threw it into neutral and sat there a minute, then slowly road around the block a couple times and it seemed to be fine.

About a week later the bike died in a bank parking lot and I had to replace the battery because it was dead. So, yesterday I'm riding and the bike starts acting really funny and not wanting to go into gear. The brake was ridiculously touchy and the bike died in 1st a couple of times and then wouldn't shift out of neutral. About half a mile down the road it started to lose power again to the throttle. I was in 2nd and noticed the bike slowing and losing power again. Before I could grab the clutch the RPM's went through the roof and the bike took off and subsequently ran right out from under be.... Literally.

Anyone have any ideas? I'm a noob I know but I seriously think mechanically something malfunctioned causing the wreck.
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Old 11-24-2012, 03:39 AM   #2
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Quote:
Originally Posted by PinkDawnCBR600 View Post
About half a mile down the road it started to lose power again to the throttle. I was in 2nd and noticed the bike slowing and losing power again. Before I could grab the clutch the RPM's went through the roof and the bike took off and subsequently ran right out from under be.... Literally.
When it started loosing power were you twisting on the gas trying to get it to go? That would account for the RPM's shooting up..

Easy to not notice in the heat of the moment.

So far a loosing power it could be any number of things, especially on an older carbed bike. Could be as simple as the tank vent being pluged.
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Old 11-24-2012, 03:45 AM   #3
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Yeah I was still on the throttle because I was going down the road. I didn't GAS it or anything so if it re-gained power not sure why it would take off like that.... Yeah I don't know a lot about bikes so I know there is a problem just not sure what


QUOTE=texlurch;3419136]When it started loosing power were you twisting on the gas trying to get it to go? That would account for the RPM's shooting up..

Easy to not notice in the heat of the moment.

So far a loosing power it could be any number of things, especially on an older carbed bike. Could be as simple as the tank vent being pluged.[/QUOTE]
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Old 11-24-2012, 03:50 AM   #4
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The throttle is hooked to the carbs with a cable, so unless the carbs are stuck in a wide open position, there isn't any way for the RPMS to just shoot up.

Could be fuel pump
filter
tank vent
deposits clogging the jets

Hard to diagnose sitting here 12000 miles away..
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Old 11-24-2012, 03:56 AM   #5
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Quote:
Originally Posted by texlurch View Post
The throttle is hooked to the carbs with a cable, so unless the carbs are stuck in a wide open position, there isn't any way for the RPMS to just shoot up.

Could be fuel pump
filter
tank vent
deposits clogging the jets

Hard to diagnose sitting here 12000 miles away..
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Old 11-24-2012, 04:03 AM   #6
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Originally Posted by PinkDawnCBR600 View Post
You are doing great!

Datz cuz I gots madz skilz yo!
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Old 11-24-2012, 04:41 AM   #7
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Old 11-24-2012, 05:28 AM   #8
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If the spark was intermittent, could be a coil/plug problem. Loose ground somewhere...it could be a number of problems.

Best thing is to always have someone look at the bike before you purchase it. Someone that is really knowledgeable about motorcycles and their mechanics. They could test drive it and look over all the details before you buy a lemon. My nephew bought a bike that he thought was great. He brought it over to my house and within 5 minutes I figured out it was a death trap. Frame was cracked in two places, fork seals were busted, rim bent, chain stretched to it's limits, motor mount busted, charging system shorted. He thought it was a good deal because it had new tires on it. So, in short, have someone experienced look at a bike before you purchase it. There is a sponsor on this board that will do it at no cost.

Good luck with your next bike!
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Old 11-24-2012, 06:51 AM   #9
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just take it motorcycles unlimited, they can fix it. yes they are a long ways away, but worth it.

http://www.motorcycles-unlimited.com/

even if somebody knew exactly what was wrong, are you going to fix it?

shoulda taken it to them for a pre-purchase check up, they might have caught it in the first place
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Old 11-24-2012, 07:54 AM   #10
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Seriously, it's hard to diagnose with out seeing the bike. From your description it could even be the front brake dragging as it heats up.
The bike slows, more throttle and it seems like you're losing power.
You really should have it looked at by a reputable shop and I will get on board with the others and say Motorcycles Unlimited. Patrick will take good care of you.
If you need help getting it there I'll be happy to help or I'm sure plenty of volunteers will appear
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Old 11-24-2012, 08:00 AM   #11
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agreed, let patrick see it
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Old 11-24-2012, 10:13 AM   #12
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Before you take it anywhere, check the batter cables, make sure they're tight. Both of them. I had the same problem with a 98 cbr I owned, turned out the cables weren't snug after a battery change and they were losing contact and certain points during a ride. Good luck!
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Old 11-24-2012, 10:28 AM   #13
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How much did u pay for the bike?

I would honestly think about if the bike is even worth fixing. Your cheap bike can easily double in cost when trying to take it to a shop to fix.

Like said above, take it Patrick at Motorcycles Unlimited. Let him at least look at it and ask him if its even worth fixing.
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Old 11-24-2012, 11:53 AM   #14
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Quote:
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I would honestly think about if the bike is even worth fixing. Your cheap bike can easily double in cost when trying to take it to a shop to fix.
Needs some careful assessment, for sure. Looking at the posted photos, there are some tell tale signs of having been kept outside, for long periods. Rust on the fork sliders, oxidation on the cylinder head, etc. A carbureted bike, sitting outside, with ethanol laced fuel, is a recipe for problems. Needs a trained eye to make an assessment.
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Old 11-24-2012, 03:47 PM   #15
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Go finance a newer one if ya can. Old bikes arent worth the effort unless you think working on a bike is fun..which some people do.
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Old 11-24-2012, 03:53 PM   #16
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Quote:
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Go finance a newer one if ya can. Old bikes arent worth the effort unless you think working on a bike is fun..which some people do.
exactly, fixing an old cbr is just putting perfume on .
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Old 11-24-2012, 04:26 PM   #17
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Used to have one of those......

I can tell you exactly what the problem is. The old Honda's are notorious for burning up voltage regulators. The battery you replaced probably wasn't bad. The voltage regulator is between the alternator & battery & will prevent the battery from charging when it fails. The alternator doesn't make enough power to run the bike without the battery so once it gets close to going dead problems start.

Most common is that it will act like its out of gas. Sputtering & running like with occasional bursts of power. Eventually it dies all the way & you're stuck. Sounds like what happened but inexperience cost you some skin. The bike is easy to fix for a few hundred bucks. Don't listen to all the haters. Fuel injection has its downsides too. Stay on the beater bike until you know how to ride or else the inevitable next learning experience will cost a lot more. If you need any more technical help with it feel free to pm with questions.
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Old 11-24-2012, 05:16 PM   #18
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Granted my bike is a different beast. But the symptoms yours has sounds exactly like what mine was doing. Was a combination of bad plug wires, coils and the fuel air mixture on one of the carbs.
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Old 11-24-2012, 05:54 PM   #19
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All these guys keep posting on this and she ain't even answering..
Wait a sec.. nm
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Old 11-24-2012, 06:10 PM   #20
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PM me for questions, wait a minute you want answers. As others have mentioned Motorcycles Unlimited would be a great place to take it.
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