newly purchased 98cbr600fs, need help - TwoWheelForum: Motorcycle and Sportbike forums
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post #1 of 31 (permalink) Old 11-09-2006, 08:41 PM Thread Starter
 
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newly purchased 98cbr600fs, need help

ive been riding it for about 2 days now, and it has ridden wonderfully until tonight when i was on it for about an hour.

I was riding home getting off the last interchange preparing to leave the highway and about 1/2 mile from my exit my bike backfires and the engine turns off.

I'm thinking WTF did i do to my brand new (ya its old, but only 5000 miles) used bike. I havent been riding long so obviously i'm thinking "o **** i ran out of gas" which turned out not to be the case. i pull over check my gas, and i have half a tank. i check my fuel supply valve and its still "ON". all the while i've been trying to restart my bike unsuccessfully (its turning but wont cooperate). i check the ignition and the kill switch, just peachy. i put the choke on and get the bike running again, but it still didnt "feel" like it should have. the clutch seemed really finiky and it felt more like the bike was telling me what to do and not visa versa.

I get to my off ramp and pull down to a stoplight about a mile and a quarter from where my bike stalled, i turn a corner and no more than 100 ft i hear another backfire and boom, the engine dies again. i do the same routine and nothing seems to work except waiting a few minutes and restarting the engine with the choke on (i did turn the choke off on the highway upon getting back up to speed). now i'm travelling about 200 ft and i turn left to go up a hill and am almost to my house, about 100 ft up this hill the bike dies again. whoa. i follow the same routine that worked the last two times, get the bike started and it dies again. so i get the bike started AGAIN and put it in neutral and hear this aweful click clack clack clack click clack clack noise after disengaging the clutch. yuck. well i still have 100 ft up a hill and 50 feet to my drive way, so i put the choke on, and drive it home. When i get there i notice the engine is heating WAY up. i turn off the ignition and a fan is still running trying to cool it down, which has never happened before. The bike is off and the temperature guage is still rising. Wow, now im thkining there can be at least 3 things wrong with this bike. I call the dealership and talk to the guy whom sold it to me.

blah blah blah he gives me thier bull**** about how he'll have the mechanics call me in the morning. okay great, thats all i expected from him, but what irks me is that service is supposed to test rde the bike, check and top off all fluid levels, and generally make sure everything is running up to snuff on the bike. He said they usually go ride it for about 15 minutes, so if the problem wouldnt arise unless driving for extended periods they obviously would have missed this.

If you've actually managed to get through the encyclopedia sized post i just wrote, does anybody here have any idea what may be wrong. I dont have my owners manual yet ( i bought one on ebay before realizing i could get a service manual from this site for free) so i'm not sure what to check for or how to troubleshoot. if anybody can shed some light on the situation from what i've described that be wonderful.

like i said i'm a new rider but i am not an idiot. I know what i'm doing out there , i know how to shift, i understand manual transmission (i learned when i was 16 and have been driving it since), i know how an engine works and i know how bikes work; i've read 3 "everything you need to know about motercycling" books front to back before even getting on a bike. I'm 99% sure that this problem was not user created.

any ideas?

Last edited by NONE_too_SOFT; 11-09-2006 at 08:45 PM.
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post #2 of 31 (permalink) Old 11-09-2006, 09:06 PM
 
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nothing jumping out at me as an obvious answer... whish i could help more.. but I can wish you luck and remember most states lemon laws are online never too early to do your research... in MA where I live if they try and fix the same problem 3 times and cant get it fixed you get your cash back... do some research in case this turns out to be major..

tip document everything and e-mail the manager your concerns and also the salesmen... get them to e-mail you what they find that way you have stuff in writing from them and ask them what they plan on doing for you and get that sent to you in an e-mail also... remember when it comes down to one mans word against the other its the guy who has it in writing that usually is more believable...


best of luck... hope it's nothing major...
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post #3 of 31 (permalink) Old 11-09-2006, 10:06 PM
 
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have you checked the oil in it? the click clack sound makes me think theres something metal that is loose/broken in there that shouldnt be.
in any case, let the shop that sold you the bike look at it before you do ANY investigating it.

and make sure you document where you took it for service, for what problem, and when. then test ride it and write down if they managed to fix the problem or not.
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post #4 of 31 (permalink) Old 11-10-2006, 07:20 AM
 
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Are you sure you had enough gas? That wouldn't explain the backfire...but switching to reserve might have done something.



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post #5 of 31 (permalink) Old 11-10-2006, 12:21 PM Thread Starter
 
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yah like i said i opened up the fuel tank and saw plenty of gas sitting down there... the engine only backfired right before it cut off i believe, i just heard and audible "POP" sound right before the engine turned off.

I'm gonna get my bike and try to ride it to work on my lunch break and see how it acts. I talked to maintenance today and they told me to bring it up so they can try to "recreate" the problem... so what are they gonna do, take it out and ride it on the highway for an hour?

thanks for the tips to keep everyting in writing, i'll be sure to e-mail the store manager tonight.

if anybody has any lightbulbs popping up over thier heads please speak up!
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post #6 of 31 (permalink) Old 11-10-2006, 02:37 PM
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That is a carbed bike...

I think your jetting is off.

Do you have a aftermarket exhaust on it?




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post #7 of 31 (permalink) Old 11-10-2006, 05:50 PM Thread Starter
 
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That is a carbed bike...

I think your jetting is off.

Do you have a aftermarket exhaust on it?
as far as i know , no, the exaust is stock. I'm only going by what i've seen in stock photos on the net though. there are a couple of knicks on it in odd places maybe it was worked on or something. any way i could tell for sure?
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post #8 of 31 (permalink) Old 11-10-2006, 07:10 PM
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Yeah post a few pics here of the bike...

Where are you located? What is your elevation?




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post #9 of 31 (permalink) Old 11-11-2006, 12:37 AM
 
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Hmmm...sounds like a good one...need more info,do you smell or see gas? This is one you'd need to have in front of you to check certain conditions to begin to diagnose...it's hard to do on just a vauge discription...keep us posted...DO NOT sign or pay for anything until you are SURE there was no damage that has not been repaired caused from the orig. problem!!!
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post #10 of 31 (permalink) Old 11-11-2006, 02:29 AM
 
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[QUOTE=Gas Man;259111]Yeah post a few pics here of the bike...[QUOTE]

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post #11 of 31 (permalink) Old 11-11-2006, 06:49 AM
 
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You said that you only began hearing a clacking sound once you released the clutch? sounds like a bottom end problem...if you can get the bike started and it makes the same sound grab yourself a metal rod and start to press it it agints certain parts of the motor and put your ear on it. Try and pinpoint it and go from there. Be carful that the noise you hear from one end of the motor could possibly be comming from further down the motor.

Hope that kinda helps!
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post #12 of 31 (permalink) Old 11-11-2006, 10:57 AM Thread Starter
 
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Originally Posted by JEKYLL View Post
Hmmm...sounds like a good one...need more info,do you smell or see gas? This is one you'd need to have in front of you to check certain conditions to begin to diagnose...it's hard to do on just a vauge discription...keep us posted...DO NOT sign or pay for anything until you are SURE there was no damage that has not been repaired caused from the orig. problem!!!

welllll i took it to the dealer today and i had to sign an invoice for service today. I'm really pissed that i just bought a bike that i have to spend additional $ on to get to work properly, i woulda been better off buying a newer (more expensive) bike if these *******s are gonna extort me like this.

I'm going to shoot the owner of the store an e-mail and tell him whats goin on. I cant see ever being a patron of this place again if this is how they are going to conduct business.



i dont have any decent pics and the bike is no longer at my house so theres not much i can do right now to help you guys any more, wish i should have gotten these post last night
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post #13 of 31 (permalink) Old 11-11-2006, 09:38 PM
 
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I know that CBRs can have problems with the cam chain tensioners... that could make a metalic rattle but I dont know about a clank.. and I dont know if that could lead to any other issues with the bike..
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post #14 of 31 (permalink) Old 11-11-2006, 11:43 PM
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Good call Tater... that is very true!




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post #15 of 31 (permalink) Old 11-12-2006, 08:30 AM
 
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far as I know, from my reading, the stock CCT just rattles, doesnt cause any other problems though.
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post #16 of 31 (permalink) Old 11-12-2006, 12:09 PM Thread Starter
 
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From talking with people that are a little more well versed in motorcycleology than I, they mentioned the stalling could be due to bad spark plugs... if they plugs in that bike are the orriginals and they've been in there for 8 years I suppose that may be true. Does anybody have anything to say about spark plugs or even the timing of the engine? (remember i said when i have the clutch pulled in first the bike will slowly idle to a stall)
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post #17 of 31 (permalink) Old 11-12-2006, 04:09 PM
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A dead plug could cause similar problems. You should be able to easily tell by the color and or wetness if you have a bad plug.

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post #18 of 31 (permalink) Old 11-12-2006, 05:26 PM
 
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a dead plug would also cause the motor to vibrate like crazy I think. you'd notice the sudden drop in power too.
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post #19 of 31 (permalink) Old 11-12-2006, 06:52 PM Thread Starter
 
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I remember when I was replacing plugs on my honda civic's v4 that i started it up with 3 and the way the motor reacted was much like it reacted on my bike. I'm really hoping its just something as easy to fix as that. I wish i wouldnt have taken my bike to the dealer so quickly now, but i still dont have my damn owners manual and the one on these forums is for a cbr600f1 ... are they basically the same model?
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post #20 of 31 (permalink) Old 11-12-2006, 07:57 PM
 
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I would start with checking the plugs and then move to the carbs...Because it is starting, but you need to "choke it" when running...sounds like plugs or carbs...on a bike that old, you need to get the proper shop manual and take the carbs completely apart and rebuild them and clean the intakes...

And the CCT (cam chain tensioner) does exactly that...it keeps tension on the cam chain so you don't slip a tooth or spin on a cam gear when riding...especially at higher RPM's. It is the lifter that goes out and causes the rattle that you hear. And unless you think bent valves or damaged pistons are minor repairs...it needs to be repaired ASAP...
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