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21
The Motobrick Workshop / Re: K75S swoosh when fuel filler is opened
« Last post by SDCR john on April 21, 2019, 07:55:29 AM »
Laitch,

Interestingly, my bike came from California, around 2004.  The doctor that I bought it from, relocated to the east coast at that time.

  I did see the pipe at the crankcase, near the radiator. At some point, this was plugged. The check valve was just running a few (about 8) inches from where it exited the underside of the tank. I plan on running a direct vent hose, following the drain line to the right side peg area, ASAP. I guess that I wont need high pressure hose, just something that can handle gasoline.

I very much appreciate all of the help and insight that you folks have offered with this issue. It is about the only thing that I have found on the bike, that is not functioning properly.

If you're logged in you'll see a link to the bulletin at the bottom of this post. What volador is recommending is the way to go. The bulletin's instructions enable the hose to be reconnected if necessary to meet California emissions inspection, but only a K owner in California could tell us if that is still a consideration out there during inspection.
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The Motobrick Workshop / Re: Need experianced eyes on a few pictures by my K75
« Last post by Laitch on April 21, 2019, 05:07:34 AM »
Laitch
Oh! Right. I apologize. English is not my first language . . .
Apology is unnecessary. Clarification is the goal so that understanding is shared.
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The Motobrick Workshop / Re: Need experianced eyes on a few pictures by my K75
« Last post by JoHo on April 21, 2019, 03:04:10 AM »
Laitch
Oh! Right. I apologize. English is not my first language and all of this is pretty new to me with technical terms. I will clean it and seal it, the gear position cover that is.


What I meant about “cylinder” was the hole in the bottom of my block where the exhaust manifold goes. One of them has a lot more black stuff inside and a more brown’ish color like in the picture.

Valve clearences, check. Thank you again for all your help. I feel a lot better doing this project with this awesome forum for guideance!
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The Motobrick Workshop / Re: K75S swoosh when fuel filler is opened
« Last post by Laitch on April 21, 2019, 02:17:37 AM »
The fuel tank vent is/was routed to the front of the crankcase connected to a small tube sticking up located around the radiator shroud bottom. This was for EPA standards later removed. There's a service bulletin about that......as you could get fuel into the crankcase if overfilling the tank.
If you're logged in you'll see a link to the bulletin at the bottom of this post. What volador is recommending is the way to go. The bulletin's instructions enable the hose to be reconnected if necessary to meet California emissions inspection, but only a K owner in California could tell us if that is still a consideration out there during inspection.
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The Motobrick Workshop / Re: Need experianced eyes on a few pictures by my K75
« Last post by Laitch on April 21, 2019, 02:07:24 AM »
- thank you for pointing that out with the clutch. But it’s the picture that was weird. ..
I noticed when removing the exhaust manifold that one of my cylinders seems to be sweating a tad more than the others .. I’m kinda concerned - should i be?
What I was indicating wasn't a clutch part. It was the cover for the gear position indicator switch. If its cover is not damaged, seal its edges and surface with silicone sealer or equivalent product to inhibit damage from water, grit and heat.

I don't notice "sweat" in a cylinder, but I do notice what appears to be a spark plug that seams to be overheating. Its color should not be white if it is firing. Overheating can occur from air leaks causing a fuel mixture that is too lean. All the throttle body manifolds and the crankcase breather should be checked for leakage and cracking; the vacuum port caps on the throttle bodies should be checked.



Put checking the valve clearances on your task list too, if it isn't there already.
26
The Motobrick Workshop / Re: Turn signal brightness
« Last post by Laitch on April 21, 2019, 01:38:22 AM »
. . .The turn signals look a little dim in the sunlight. . . .mine seem like they flash real slow. What is the correct flash rate for these bikes?
Incandescent bulbs dim as they age. Replacement might be appropriate. Check the inside surfaces of the lenses for dust. 60–120 flashes per minute is the accepted rate. All turn signals should flash at the same rate.
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The Motobrick Workshop / Turn signal brightness
« Last post by JPaganel on April 20, 2019, 08:52:26 PM »
It was a nice sunny day today, and it got me thinking.

The turn signals look a little dim in the sunlight. Is there something people use to make them brighter? A type of bulb, LED, what have you.

I don't really want to replace the stock housings, I like them as they are.

Also, mine seem like they flash real slow. What is the correct flash rate for these bikes?
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Project Classic Motobricks / Re: How to monster a brick, instead of cafe it.
« Last post by daveson on April 20, 2019, 08:51:32 PM »
You could be onto something there. When I look in the riders handbook, early models (don't have the later book,  though my bike is)  220 is close to redline in fifth,  150 is close to redline in third,  but 50 isn't close to anything on the graph.

I spose I'll put it back into the file of "Things I know I shouldn't wonder about but do"

I spose I'd have more replies if I made a separate thread on it, but then I'd have to take it back out of the file that I shouldn't even be looking at.
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The Motobrick Workshop / Re: K75S swoosh when fuel filler is opened
« Last post by SDCR john on April 20, 2019, 06:58:43 PM »
Great, thanks for your help, and patience with my lack of details.
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The Motobrick Workshop / Re: K75S swoosh when fuel filler is opened
« Last post by volador on April 20, 2019, 06:20:18 PM »
Yes and you should be good to go
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