Aftermarket carb diaphrapms

[azure]

Anyone used these? Did it work out OK?

http://www.carburetordiaphragms.com/shop/yamaha/set-of-four-brand-new-aftermarket-carburetor-diaphragms-yamaha-fj1100-fj1200-1984-1993-mikuni-bs34-carb/


Thanks and sorry if this has been covered previously.
Ben

[FJmonkey]

Other AM parts have been discussed and tried. But these have an index tab, the others did not. The others were reported to be thicker and stiffer so performance was in question. Not sure how these compare to stock regarding stiffness.

[Pat Conlon]

http://www.fjowners.com/index.php?topic=5340.0

See post #27 on page 2

[azure]

Thanks guys! At 1/4 the cost of Randy's replacements, I might have to try them before contacting RPM. I will report if I do.

Happy all hallows eve!

[fj1289]

The other way to think of it is realize you are risking paying 125% and taking a lot longer to get to a final solution if the 25% plan doesn't work our satisfactorily

[azure]

Yep, I like to think I have an explorer's curiosity and heart, although most of the things that I thought I had discovered said " Kilroy was here"

So it goes, as Mr. Vonnegut already said!

[mr blackstock]

G'day,

I bought my carb diaphragms off JBM industries years ago, and have been very satisfied with them.  They were cheap, easy to fit, and across quite a few forums are recommended.
http://www.jbmindustries.com/
I run them in my FJ and XJ, I use fuel injector cleaners, and the diaphragms have never given me issue.

cheers, Gareth 

[azure]

Thanks Gareth, sorry, I just noted your post.

I have been looking at the K&L 18-2657 slide with diaphragms available around and on ebay. Anyone using these successfully?

Thanks!
Ben

[racerrad8]

Ben,

If you take advantage of the RPM holiday sale, I believe you can buy the genuine Yamaha Carb Diaphragm/Slide cheaper than the aftermarket ones you are looking at.

Randy - RPM

[azure]

Thanks Randy!

K&L is saying their stuff is oem Mikuni. 4 are $280. Shipped, hence my dilemma. If these are equal quality, I'd rather use these and put the $100. savings towards your fork valves and springs.

Ben,

If you take advantage of the RPM holiday sale, I believe you can buy the genuine Yamaha Carb Diaphragm/Slide cheaper than the aftermarket ones you are looking at.

Randy - RPM

[racerrad8]

Thanks Randy!

K&L is saying their stuff is oem Mikuni. 4 are $280. Shipped, hence my dilemma. If these are equal quality, I'd rather use these and put the $100. savings towards your fork valves and springs.

I just checked my K&L price list. Wow, that is cheap. That is $17.50 each cheaper than the K&L MAP (minimum advertised pricing). That is even cheaper than the K&L dealer pricing with free shipping to boot.

I have purchased them in the past and they always came in the Tourmax box; I was not comfortable selling them becuase I could not ensure the quality. I only stock, sell and use the Genuine Yamaha/Mikuni slides which I buy directly from Yamaha.

Randy - RPM

[azure]

Thank Randy,

All of the parts that I have purchased from you, a not insignificant number, have been of the best quality. Your technical assistance
and service always makes buying from other sources a less assured and less desirable situation, reminding me of my thoughts when  shopping at Home Depot vs a specialized lumber yard. I will post to relate how these things go, and look forward to getting the fork springs and RPM valves when they come in!

Hope the racing is going well out your way, and best Thanksgiving wishes,
Ben

[fnlyafjat51]

http://www.fjowners.com/index.php?topic=5340.0

See post #27 on page 2

Read through this, and have to agree with Randy in that post. A thicker material with stock spring will require more vacuum to perform at optimum levels. Not sure using different needles would be a viable solution as it seems it would create a rich condition.
My thought is, why not trim the springs in small amounts, say 1/8 coil at a time (or find softer springs) until full lift is achieved ? The only draw back to this would be that if you went back to oem diaphragms, you would need to get new springs, or shim under with a nylon washer or shim to keep from adding substantial weight to the slides.
The down side to that thought is that the slides may open too quickly in the lower rpm range.
All that being said, for someone that is just cruising, they prob. wont notice a thing (like me  ).

[azure]

Received these earlier this week, don't say K&L as advertised, but the diaphragms feel supple and of uniform and similar thickness to originals. I will mic when I finally find install time.

[azure]

Hmm, took a better look at these in contrast to my old diaphragms and slides today. The new ones have are cut away at their base, while the old ones are flat. Will these slides work?