Mikes xs650 breather valve.

chasbmw · Jan 27, 2017

pete.v said:
baz said:

Actually it's a tm40 I had on my commando it's not fitted at the moment as I resorted back to twin amals because I have a knee and foot problem and starting the bike is much easier with the amals , maybe 1 or 2 kicks but with the TM it can be between 2 or 3 to maybe 7 or 8 kicks,as soon as I can I will re fit the TM ,it definitely gives my bike more power between 0 and around 110 mph on my commando which is a stock 750 motor it will pull into the red easily if I want it to,I have had lots of different carbs on this bike including a single 32 CV a 34 VM then a 36 VM etc but they don't come close to the 40mm flatslide mikuni pumper for power I just wish it started better!!!!

Click to expand...

I cannot recall the last time it took more than 1 kick to start. I twist the throttle twice, push it through once key off and away I go. When starting hot I just kick it and go. I will say this, it sure starts better with the Smartfire over the Maggy.

It was 60 degrees in Michigan Saturday. It hadn't started since the warm up we had in December. "1 kick only, Ryan" An awesome 50 mile jaunt in a Michigan January? Killer.

RGM can supply a long folding kickstarter, like the one fitted to a T160, it makes starting the bike so much easier really helps dodgy knees and is so much cheaper than an electric foot

850cmndo · Jan 27, 2017

I'm sure what I'm asking is somewhere out here, but where can one source the Mikes breather with the fittings at 180 degrees?

splatt · Jan 27, 2017

MFB said:
I just checked out Mike's installation instructions.
I always thought PVC was a type of plastic (polyvinyl chloride) :evil:

It is, but a P C V is a form of positive crankcase ventilation, mild dyslexia ?

Fast Eddie · Jan 27, 2017

chasbmw said:
RGM can supply a long folding kickstarter, like the one fitted to a T160, it makes starting the bike so much easier really helps dodgy knees and is so much cheaper than an electric foot

+1 on that Charles.

eskasteve · Jan 27, 2017

850cmndo said:
I'm sure what I'm asking is somewhere out here, but where can one source the Mikes breather with the fittings at 180 degrees?

You could contact Mike's XS . mikesxs.net
They will be able to let you know if the are still available.

rolf-eigil · Jan 29, 2017

Hi Guys!

You will find a nice breather on old japanese cars from the -70 and -80.
I have picked up many and used them with great sucsess.

850cmndo · Jan 29, 2017

eskasteve said:
850cmndo said:

I'm sure what I'm asking is somewhere out here, but where can one source the Mikes breather with the fittings at 180 degrees?

Click to expand...

You could contact Mike's XS . mikesxs.net
They will be able to let you know if the are still available.[/quot

My thanks.

kommando · Jan 29, 2017

850cmndo wrote:
I'm sure what I'm asking is somewhere out here, but where can one source the Mikes breather with the fittings at 180 degrees?

Yamaha YZF R 125 EGR exhaust valve off ebay

Fast Eddie · Jan 30, 2017

kommando said:
850cmndo wrote:
I'm sure what I'm asking is somewhere out here, but where can one source the Mikes breather with the fittings at 180 degrees?

Click to expand...

Yamaha YZF R 125 EGR exhaust valve off ebay

I'm curious as to how many times you're going answer that same question in this same thread...!?!

MFB · Jan 30, 2017

splatt said:
MFB said:

I just checked out Mike's installation instructions.
I always thought PVC was a type of plastic (polyvinyl chloride) :evil:

Click to expand...

It is, but a P C V is a form of positive crankcase ventilation, mild dyslexia ?

It must be.
All the manuals I've read abbreviate positive crankcase ventilation as PCV, but Mike's instructions call it a PVC valve.
As Effie would say, "how embarrassment" (for those who can remember 1980's TV comedy).
I've got one of Mike's reed valves on my bike, and it's definitely not made of plastic.

kommando · Jan 30, 2017

Fast Eddie said:
kommando said:

850cmndo wrote:
I'm sure what I'm asking is somewhere out here, but where can one source the Mikes breather with the fittings at 180 degrees?

Click to expand...

Yamaha YZF R 125 EGR exhaust valve off ebay

Click to expand...

I'm curious as to how many times you're going answer that same question in this same thread...!?!

Once a page is my guess, maybe I should make sure its the first post on every page

N0rt0nelectr@ · Jan 30, 2017

I am just now looking at this thread so forgive me for asking questions that my have already been asked.
How is it plumbed? By the pictures I can see one line coming off the breather and 2 others going somewhere I assume at least 1 goes to the oil tank what about the other line?

John in Texas

kommando · Jan 30, 2017

I am just now looking at this thread so forgive me for asking questions that my have already been asked.
How is it plumbed? By the pictures I can see one line coming off the breather and 2 others going somewhere I assume at least 1 goes to the oil tank what about the other line?

The other goes to whatever breather outlet you have on the engine which varies by year and what ever mods have been done in the past. It its an early engine with the timed breather then you need another outlet.

MFB · Jan 30, 2017

N0rt0nelectr@ said:
I am just now looking at this thread so forgive me for asking questions that my have already been asked.
How is it plumbed? By the pictures I can see one line coming off the breather and 2 others going somewhere I assume at least 1 goes to the oil tank what about the other line?

John in Texas

The reed valve is an in-line thing, with one inlet and one outlet. Other pipes in the photo must be in the background.

In the case of my setup, like Ashman's, my outlet does not go to the oil tank but to my home made catch tank and then to atmosphere.

I blanked off my original timed camshaft breather and converted to timing case breathing.

Woody850 · Jan 24, 2018

Hallo All,
I'm looking for one of these XS650 Reed valves and see the only supplier after a good search is Mike, but he does not have them in stock at the moment. I live in Germany and wonder if anbody knows of another dealer.
I think after what I have read it would be the answer for my 73 Commando however I do like your application MS850 but do you have it venting to atmosphere in front of your back wheel?

guest76 · Jan 24, 2018

@Woody850 Give Constant a call over at Holland Norton Works - he’s near you, and usually has them in stock!

http://www.hollandnortonworks.eu

htown16 · Jan 24, 2018

Wel,l I tried the Mikes but ended up taking it off. I would kick the bike over and it would make a wheezing noise with the oil cap off. I'm assuming this was when the pistons were on an up-stroke and drawing air into the crankcase. The valve is one direction only and only flows air out of the crankcase. It blocks any returning air. Maybe it is harmless but I'm breaking the bike in after a complete rebuild and decided not to have one more thing to worry about. After the break-in I may try it again.

Triton Thrasher · Jan 24, 2018

htown16 said:
Wel,l I tried the Mikes but ended up taking it off. I would kick the bike over and it would make a wheezing noise with the oil cap off. I'm assuming this was when the pistons were on an up-stroke and drawing air into the crankcase. The valve is one direction only and only flows air out of the crankcase. It blocks any returning air. Maybe it is harmless but I'm breaking the bike in after a complete rebuild and decided not to have one more thing to worry about. After the break-in I may try it again.

You don't need or want returning air. The valve being one direction only is the whole point of it.

concours · Jan 25, 2018

htown16 said:
Wel,l I tried the Mikes but ended up taking it off. I would kick the bike over and it would make a wheezing noise with the oil cap off. I'm assuming this was when the pistons were on an up-stroke and drawing air into the crankcase. The valve is one direction only and only flows air out of the crankcase. It blocks any returning air. Maybe it is harmless but I'm breaking the bike in after a complete rebuild and decided not to have one more thing to worry about. After the break-in I may try it again.

Explain what your worry is.

JimC · Jan 25, 2018

Unfortunately, I see too many contributions from people who don't have a clue about which they are posting. Two others that come to mind are the relationship of master cylinder to caliper ratio and it's effect on disc brake performance, the other being rim size. No, a Brembo of less than optimal ratio will not out perform a Lockheed of optimal ratio. How in the hell can two tires having the same circumference, but different rim diameter, have markedly different handling characteristics? Placebo affect?

Mikes xs650 breather valve.

chasbmw

850cmndo

splatt

Fast Eddie

eskasteve

rolf-eigil

850cmndo

kommando

Fast Eddie

MFB

kommando

N0rt0nelectr@

kommando

MFB

Woody850

guest76

Guest

htown16

Triton Thrasher

concours

JimC

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