Author Topic: Caught in the rain last night...  (Read 817 times)

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Offline le_sterls

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Caught in the rain last night...
« on: June 13, 2010, 10:16:39 AM »
Riding home from my buddy's birthday, cruisin on the freeway. Get hit by a downpour a good ways from my house. First off, my bike is running like complete #$%* after riding a little bit in the rain. Pretty much felt like I was runnin on 3 cylinders (I couldn't go faster than 50-55.) and the engine would die if the RPMs fell below 2 grand. Now I did a search and read that I should cut the carb drain lines shorter, as the carbs create a vacuum and suck in small amounts of water through these drain lines, I'm curious how short I should cut them. I've also read that the points will tend to get wet, due to a poor gasket design. This was my first time riding in the rain, and it sucks. my 2nd problem was the more terrifying one I experienced. Coming off of the freeway, I had to brake, and go left. Using common sense, I don't touch the rear brake because its pouring. I grab the front brake, and nothing. No stopping, no squeaking, nothing. So I'm forced to hit my rear brake, at this time I'm rather close to the intersection. I locked my rear tire, cause it was my only brake, the bike stepped out from me, and thank god it was 2 am, because I ended up coasting across the street into a gas station, which happened to be closed (Just my luck.) and gave my bike a few minutes to recover under the awning. At this point I was 4 miles from my house my engine had died when I had slid, and I'm just glad I didn't lay her down, and I've got her outta the rain for a few. Needless to say I made it home safely, but does anyone know about the front brake acting like that in rain? I'm concerned about the bike running in the rain, but twice as concerned about its ability to stop. Well I'm off to clean her up and apologize countless times to it.

le_sterls
That's what I'd like to hear.
'77 CB550k - running... For now...

Offline TwoTired

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Re: Caught in the rain last night...
« Reply #1 on: June 13, 2010, 10:32:27 AM »
Front brakes suck in the rain.  ...Badly.  I will ride the brake in the rain to clear off and heat the disk a little.  It still works at only 50%, but it is something.  No fear of locking the front tire in the rain!   ;D

Mostly, I just learned to anticipate the quirks of the bike.  SS brake lines helped a bunch, too.  Old rubber ones just expand when squeezing harder on the hand lever.

I always wondered about cutting a v groove in the pads to help shed water.  But, mostly, I just learned to cope with the situation.

The cylinders cutting out issue with mine was the points getting wet.  I made a neoprene gasket for the points cover and that cured my 550's engine run issues.  My carb drain lines are still in the stock position.  FYI

Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Offline le_sterls

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Re: Caught in the rain last night...
« Reply #2 on: June 13, 2010, 11:41:55 AM »
Thanks for the input. I figured my front brake would have much less stopping power, but the idea of it not working at all hadn't occurred to me until it was actually happening. I will more than likely make a gasket like you mentioned, and most definitely ride the front brake a little bit in the rain. I'm definitely going to avoid the rain, but sometimes you never know. I'd like for my bike to be as safe as possible, in poor conditions.
That's what I'd like to hear.
'77 CB550k - running... For now...

Offline zzpete

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Re: Caught in the rain last night...
« Reply #3 on: June 13, 2010, 12:03:20 PM »
I had a similar issue with the running bad in the rain. Turned out it was a cracked spark plug cap.
"One of the things that make motorcycling so great because it never fails to give you a feeling of freedom and adventure." - Steve McQueen

Offline 754

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Re: Caught in the rain last night...
« Reply #4 on: June 13, 2010, 12:20:34 PM »
 Where did you get the idea to not use the back brake?? I would use it.

 Front discs undrilled wont work when really soaked, Drilling will fix it. so will cutting a few (or more)  shallow grooves across  the discs. That is one area where the factory , just plain screwed up, IMO.. (it may not have been as bad a problem, with original brake pad materials)

 If your point cover lets moisture in, you will have trouble.

 Hey you live in Livonia.. cool fastener place in that town.. Gardner-Wescott.. ever see their place?
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Offline le_sterls

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Re: Caught in the rain last night...
« Reply #5 on: June 13, 2010, 12:38:46 PM »
I got the idea not to use the rear brake knowing the rear tire may lock up. It did. Yes, the factory did screw up on not making the brakes at least slotted. Drilled rotors are like cheese graters to brake pads. Out of curiosity, how much trouble am I in if the points cover lets in moisture? anything permanent? I believe I've seen Gardener-Wescott... What intersections is it off of? if you know. I forgot to mention that my tires have just about had it, making this situation all the better (insert sarcasm here.)
That's what I'd like to hear.
'77 CB550k - running... For now...

Offline TwoTired

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Re: Caught in the rain last night...
« Reply #6 on: June 13, 2010, 12:44:39 PM »
ds. Out of curiosity, how much trouble am I in if the points cover lets in moisture? anything permanent?
Nothing really permanent.  In my case, the water in there would vaporize and then re-condense onto the points... for the following two bright, sunny, dry, days!  Start up ok, when it got hot..more misfires and lost cylinders.  (Cursing didn't help it run better, btw.   :D )

Dry it out, new gasket, no more issues.

Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Offline 754

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Re: Caught in the rain last night...
« Reply #7 on: June 13, 2010, 12:46:53 PM »
 Properly done, I have never seen a drilled rotor chew up pads..

 I dont off hand know G-W's address.

 Rear brake if it gets really wet may have to be dragged a bit to keep it working.. Beware of water geting in when washing it.. check before ridong..
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline andy750

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Re: Caught in the rain last night...
« Reply #8 on: June 13, 2010, 01:22:55 PM »
Sounds like you have front brake issues independent of the rain. Get some stainless steel lines, make sure you have good pads and your brakes will work in the rain. Ive been through more than a few downpours and front brake has been fine. Not perfect but more than enough to stop me. As you found out be careful of the rear brake in the rain (or dry for that matter) if its very sensitive.

For points cover get a good gasket - either the original cork one or make a neoprene one. Only time I had a problem with water getting under the points cover was when the water covered my foot as well....flash flooding is no fun ;)

good luck
Andy

Current bikes
1. CB750K4: Long distance bike, 17 countries and counting...2001 - Trans-USA-Mexico, 2003 - European Tour, 2004 - SOHC Easy Rider Trip , 2008 - Adirondack Tour 2-up , 2013 - Tail of the Dragon Tour , 2017: 836 kit install and bottom end rebuild. And rebirth: http://forums.sohc4.net/index.php/topic,173213.msg2029836.html#msg2029836
2. CB750/810cc K2  - road racer with JMR worked head 71 hp
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Where did you go on your bike today? - http://forums.sohc4.net/index.php?topic=45183.2350