Mikuni on an R80 help

[hardwaregrrl]

Originally Posted by Les_Garten

p.s. I will put some input into the OP though.

Not sure why you are so resistant to the AFR gauge. I had a colortune at some point and found it pretty useless for tuning, other than maybe idle mix.

Not opposed, never said I was. Nathan had one when he was a ducati dealer. I may have the bike dynoed at HD, or check to see if they have an AFR gauge. I'm currently not working so I don't have cash to throw at this bike or I would purchase one.

[RGregor]

Originally Posted by Airhead Wrangler

That's entirely possible. I haven't checked yet. I appreciate the offer, but I can't measure them at the moment because they're with my bike up in Seattle. I'm down in Mexico. Sorry.

Just in case: the dello springs have an outer diameter of 20mm, length is 125 and135 mm (stiffer ones are longer)

[Les_Garten]

Originally Posted by hardwaregrrl

Not opposed, never said I was. Nathan had one when he was a ducati dealer. I may have the bike dynoed at HD, or check to see if they have an AFR gauge. I'm currently not working so I don't have cash to throw at this bike or I would purchase one.

Gotcha.


The price of the Dyno is going to be a good portion of the price of the gauge methinks.

[tradern]

You can cut the slide springs to ease the hard pull on the mikuni's. I've progressively taken almost 3cm off to great effect. This is using an MX aftermarket throttle (specifically a 2 stroke domino model). Thanks go to Mr. Rooney for this tip.

[Les_Garten]

Originally Posted by tradern

You can cut the slide springs to ease the hard pull on the mikuni's. I've progressively taken almost 3cm off to great effect. This is using an MX aftermarket throttle (specifically a 2 stroke domino model). Thanks go to Mr. Rooney for this tip.

I was just talking to a guy about this as well.

Here's a kewl video of some Yoshimura modified TMR carbs.

They are called MJN mods for multi jet nozzle.

The needle is hollow and acts as a spray bar or like an emulsion tube. Very freakin' expensive.

http://www.youtube.com/watch?v=APq5jz4T_08

[Airhead Wrangler]

Originally Posted by tradern

You can cut the slide springs to ease the hard pull on the mikuni's. I've progressively taken almost 3cm off to great effect. This is using an MX aftermarket throttle (specifically a 2 stroke domino model). Thanks go to Mr. Rooney for this tip.

I did notice that those springs are a hell of a lot longer than they need to be. You have to compress at least 3" of spring before you even start threading the cap on the carb. Way more than necessary. On the positive side, without a push/pull throttle, there's no chance in hell that the throttle would EVER get stuck with these springs. I'll call them a safety feature.

[hardwaregrrl]

Originally Posted by Les_Garten

Gotcha.


The price of the Dyno is going to be a good portion of the price of the gauge methinks.

I work for HD, I'd get a sweet deal.

[Les_Garten]

Originally Posted by hardwaregrrl

I work for HD, I'd get a sweet deal.

Ahhhh,


They know what kinda ride ya got?

[hardwaregrrl]

Originally Posted by Les_Garten

Ahhhh,


They know what kinda ride ya got?

Yep, they routinely ridicule it. I then ask them where their ride it, and they point to a cage.

[Les_Garten]

Originally Posted by hardwaregrrl

Yep, they routinely ridicule it. I then ask them where their ride it, and they point to a cage.

They do spend a large part of their life on a trailer don't they?

Get ya some jets and put it up on the Dyno and tune 'er up, or him up whichever the case may be.

Funny thing, around here, the Harley places won't put non Harleys or non standard type bikes on their Dynos. I was looking for one for mine, when I told them what it was, they said no!

I guess they don't want to deal with motors that don't look like compressors...

[Airhead Wrangler]

Originally Posted by Les_Garten

\
I guess they don't want to deal with motors that don't look like compressors...

...or motors that make more power than noise.

[supershaft]

I am about as down on stupid loud Milwaukee ass hammers as anyone right now but some of those fokkers do make as much power as they do noise. When I was a kid it was easy to put up with them because there wasn't hundreds of them all over the place. Nowadays everybody and literally their grandmother has a stupid loud ass hammer. It is still a dream of mine to get a HD and put muflers on it the size of large hard bags just to piss off the blow hards.

Back to jetting: I know I have said this before but a lot of people fail to realize that jetting envolves buying jets. It's a lot of money times two and most all of them you will eventually not need. . At least they don't have more cylinders!

[Kai Ju]

Originally Posted by Les_Garten

Ahhhh,


They know what kinda ride ya got?

Just tell them that you're riding a wide angle pushrod V twin

[Uncle Pollo]

Originally Posted by supershaft

I am about as down on stupid loud Milwaukee ass hammers as anyone right now but some of those fokkers do make as much power as they do noise. When I was a kid it was easy to put up with them because there wasn't hundreds of them all over the place. Nowadays everybody and literally their grandmother has a stupid loud ass hammer. It is still a dream of mine to get a HD and put muflers on it the size of large hard bags just to piss off the blow hards.

Back to jetting: I know I have said this before but a lot of people fail to realize that jetting envolves buying jets. It's a lot of money times two and most all of them you will eventually not need. . At least they don't have more cylinders!

Blew a hundred almost ...with a good base libe. I have enough jet fro death valley to bolivia

[mark1305]

Originally Posted by Les_Garten

They do spend a large part of their life on a trailer don't they?

Get ya some jets and put it up on the Dyno and tune 'er up, or him up whichever the case may be.

Funny thing, around here, the Harley places won't put non Harleys or non standard type bikes on their Dynos. I was looking for one for mine, when I told them what it was, they said no!

I guess they don't want to deal with motors that don't look like compressors...

I haven't had to use his dyno yet, but I have an indie HD tuner/builder here on the island that has been around for like 30 years. Old school machinist but specializes in HDs and has all the computer tuniing stuff for modern HDs as well. I buy fork oil from him to avoid driving across the river to Cocoa. Asked him about dynoing one of the Beemers if I ever needed to to dial in carbs. His reply was, "The dyno doesn't know what kind of bike is strapped onto it." That's the kind of guy you want to do business with.