Mikuni HSR42

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Apr 9, 2021 | 08:41 AM

#21

ChopperBill

Seasoned HDF Member

Joined: Nov 2005

Posts: 5,589

Likes: 4,551

From: USA

True, had Long shots, no baffles. Had the clatter. Now I have Short Shots and baffles, no clatter. I miss the clatter.

Apr 9, 2021 | 12:26 PM

#22

Jake707

Road Master

Joined: May 2018

Posts: 783

Likes: 179

From: Bay Area

It’s a HSR. I still don’t see bearings of any sort for the slide operation. Here’s pics from the manual showing all the parts. I don’t see any listed there either.

Apr 9, 2021 | 12:33 PM

#23

Architect

Seasoned HDF Member

Joined: Apr 2010

Posts: 9,568

Likes: 7,936

From: Long Island, New York

I rebuilt mine 2 seasons ago, no bearings inside.

Apr 9, 2021 | 12:45 PM

#24

BigMike

Club Member

Joined: Jan 2007

Posts: 3,559

Likes: 1,936

From: NE Florida

Just bought an FXR from my buddy. I'm pulling the Mikuni apart tomorrow and installing a new kit. It has been sitting and not ridden much over the past 6 years and doesn't pull after 3k rpms. I have the tuning manual but it was tuned fine and shouldn't need much except for a good cleaning. I've rebuilt hundreds of carburetors in all shapes and sizes, but never a Mikuni. Another one to add to the list.

Apr 9, 2021 | 01:00 PM

#25

98hotrodfatboy

Seasoned HDF Member

Joined: Mar 2010

Posts: 21,116

Likes: 7,638

From: Poolville

I think he meant muffler bearings... It's easy to get the two confused....

Apr 9, 2021 | 03:39 PM

#26

Hundskrüppel

Intermediate

Joined: Dec 2016

Posts: 42

Likes: 10

From: Munich, Germany

Quote:

Originally Posted by 98hotrodfatboy

I think he meant muffler bearings... It's easy to get the two confused....

......muffler bearings ???? I don`t even have an idea of this...

No I`m talking about the roller bearings of the HSR......I am somewhat stunned people think Mikuni is selling thousands of their carburetors for years as described in the ads above, and they could still today get away with selling them without the rollers and cheating everyone... ?

Well...ok...why not, Lectron is saying their carbs have a "idle system".... go search for it......I did....but "system" is a flexible term...

BUT .... different on the Mik... .. the throttle valve is guided by eight rollers as they say ....

Quote:

Originally Posted by Architect

I rebuilt mine 2 seasons ago, no bearings inside.

....My best guess is you did not see bearings on parts you had removed, or just did not look for some... they are not on the throttle valve or loose parts like ***** falling out when disassembling or so, maybe that`s why you did not note them....

Quote:

Originally Posted by Jake707

My mikuni def is just a slip fit in a track for the slide

....you are not able to spot the roller bearings from outside.......it would need a full disassembly...

Quote:

Originally Posted by Jake707

It’s a HSR. I still don’t see bearings of any sort for the slide operation. Here’s pics from the manual showing all the parts. I don’t see any listed there either.

....this is because sometimes parts are just not on parts fishes, sometimes not available (any more) or like in this case, not available separately....

The roller bearings are part of the body (not part of the throttle valve) , more exact one part of the body - it`s # TM42/06 on that fish.... you can only spot the rollers on the fish drawing if you know how they look in flesh....
...when disassembling the carb like for cleaning, you don`t split the body usually.....