Off idle flat spot cure

[octane]

On Randaks magnificent site there's a piece about
off idle flat spot

He prescribes a cure witch is "cheap, but tedious".
heck! that's me: heap and tedious.-)

So while I did the carbs, I thought; why not give it a try



soldered up the jets using my mini flame-thingy




goodness; it is SO darn small.
Hard to control the solder.
It looked like a disaster area in a VERY miniature kind of way,
so I had to clean up the jet in one of these things (don't know the English word)



and drilled a new hole.
I don't know about them inch. and micro drill numbers in the article,
but what is recommended is a size #98 jet or a size #100 jet.
In my book that's a 1mm hole


witch ain't easy without a 'guide' (I just held the electric micro-drill in my hand)


not so pretty.
Tried again


that will have to do.




I'll put'em on my daily ride so I have a before/after comparison

[Whiskerfish]

so I had to clean up the jet in one of these things (don't know the English word)

"Tap" is what you use to clean out the threads on a Nut. "Die" is what you use to clean the threads on a bolt like you did there.

[octane]

Thanks WF !

[rcmatt007]

dang, wf beat me too it.... just remember "tap" is something you put in a hole... like tapping a beer keg... "die" happens to the outside.... so as a teenage girl says, "Like I would just die to look that good"

[QUEEENlE]

<rolling eyes>

Q

[muser3]

Octane, I did the same "fix" couple of years ago and used the micro drill recommenced in the article.
Had to order them.
I said" them" because they are supplied in lots of 10. Now I have nine of them which I'll never use. So if anyone needs a #62 micro drill, send me a pm with your address and I'll send one to you. I have nine to give away and they're small and will not require postage beyond regular letter postage. I'd much rather share them than have them rust or get lost.
Lee

As of June 2008 all drills have been used at least once. Several were returned for further recycling but they are now all gone.

[jpbadger9]

I picked up a set of 20 assorted micro-drills at Harbor Freight a few weeks ago. The biggest one in the set is a #62. $1.99

Badger

[Jason J]

It was really easy to just drill out some #60 jets.......just my $0.02.

[BlueThunder]

I'm just curious... wouldn't it be easier to just replace the jet with a #98?
They may not be available from Honda, but are from Sudco and other Keihin carb parts suppliers - even eBay.

[curtis.71]

whats the best way to get the jets out?

[KYpondman]

Just did this on a '77 and found a simple, neat way to do. Just a touch of flux and cut a 1/8" piece of solder and drop in from top. Held it in a 3rd hand and zapped it quickly with a torch. No excess solder to clean up. worked great and did all 4 in about 15 minutes including drilling.
Claude

[philjimpot]

[quote="Jason J"]It was really easy to just drill out some #60 jets.......just my $0.02.[/quote]
That's what I did. Took about 5 minutes to drill all of them. I spent more time trying to track down a #62 drill bit.

[ericheath]

Did this drilling out the jet WORK??? I am getting ready to rebuild a set of 77's. There is also a bit on Randakks site about putting a washer under the needle from the carb slides and recapturing some wiggle. Anyone tried that with success? It seems a bit vague to "recapture the wiggle" factor.

[Jason J]

[quote="ericheath"]Did this drilling out the jet WORK??? I am getting ready to rebuild a set of 77's. There is also a bit on Randakks site about putting a washer under the needle from the carb slides and recapturing some wiggle. Anyone tried that with success? It seems a bit vague to "recapture the wiggle" factor.[/quote]

Yes and yes on both!

[ericheath]

I posted this elsewhere, but just a touch of flux, then a touch with a small soldering iron and then the solder and there is no cleanup needed to the threads. It ended up being a neat, easy, inexpensive fix.