Motorcycle Racket

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BBWB
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Re: Motorcycle Racket

Postby BBWB » Sun Nov 20, 2016 12:22 pm

There are some air jets right in the intake bell. Remove those. See if it helps.
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rowanfry
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Re: Motorcycle Racket

Postby rowanfry » Mon Nov 21, 2016 1:00 am

Thanks, will try removing the air jets, whats the idea behind that? Leans the carbs through the entire range or just the mid-upper range? Im not too familiar with motorcycle carbs, mostly just tuned dellortos on the VW. Have purchased a new set of plugs to do a reading at idle and see where I'm at.

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BBWB
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Re: Motorcycle Racket

Postby BBWB » Mon Nov 21, 2016 4:38 am

Should just lean out the very bottom end.
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john jones
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Re: Motorcycle Racket

Postby john jones » Mon Nov 21, 2016 6:25 am

rowanfry wrote:Just finished this build after 2 years, first time it's been on the road in 10 years.. Big change from what i was, its a 1978 kz750 twin, not a common bike...Fun to ride, loud and raw. Pretty happy with how it came out, the original bike was an absolute mess, so its been a pretty full on project to get it to this stage.

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Nice simple ride!!!! =D> =D> =D> =D> =D> =D>
Fortress has been secured.. Wink Wink Wink Wink Wink
No new dirty shop projects. [-X [-X [-X don't even ask... [-( [-( [-( [-(

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BBWB
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Re: Motorcycle Racket

Postby BBWB » Mon Nov 21, 2016 3:47 pm

This is the jet I speak of on the VM model carb. In the hole the light is shining in.
Image
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rowanfry
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Re: Motorcycle Racket

Postby rowanfry » Wed Dec 07, 2016 2:10 am

Hey Ben, how are you on choosing needles for the Mikuni VM carbs?

I think I have some detonation in about 1/4 to just under half throttle, if cruising at 50mph and accelerate gently its noticable, and any other light - mid load position actually, just for a bit until I really get into it. If i give it a good wrist full of throttle its fine, so thinking mains are good, and probably the last part of the needle taper is good, seems like the first part of the needle taper is a bit lean, especially given that when the bike is cold it will run fine at 1/8 throttle, around 1/4 throttte spits and pops, past half throttle runs fine.

Its running
20 pilots- best idle around 1- 1 1/2 turns out, so i dont think these are lean
2.0 slides
200 mains
6FJ6 needles
159-P8 jets

Any recomendations?


Thanks
Rowan

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BBWB
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Re: Motorcycle Racket

Postby BBWB » Wed Dec 07, 2016 6:15 am

I'd try lowering the clip on the needle one position, in effect raising the needle in the pilot jet.
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sixfootdan
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Re: Motorcycle Racket

Postby sixfootdan » Fri Dec 23, 2016 10:15 am

A semi short back story, My father got out of Nam in 1967. He lived in So Cal and bought a brand new Harley Sportster. He met a gal, Moved back to N.J, and got married. Soon after they had their first child in 1972 (Me). My Dad owned a small welding shop and could not affored a bratty kid so he sold the Harley paid the hospitial bill and withe the leftover cash bought a beat up '59 KR750. Throughout my childhood I was jokingly reminded of the Harley he sold for me and I remember sitting on it making vroom vroom noises.Now I'm 44 and have my Dad's old '56 GMC pickup and asked him if I could trade it for the Harley. Dad said yes and now it's mine. My Dad had the engine rebuilt years ago and my Brother painted it some stupid color It has a head gasket issue or cam timing is off. Just another project I don't have time for LOL

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My Brother, Nephew, and my Dad headed up from Co. Springs CO. with the bike and I rented a trailer and drug the GMC down from WA. state to McMinville OR. We all wanted to see the Spruce Goose and that's how we came up with a meeting point. The museum was awesome and I highly recommend going.

All loaded up and heading for Oregon.

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My Dad really wanted a picture of him on the bike between the two trucks lol.

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My Brother and I with the GMC.


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Spruce Goose.

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SR71 Blackbird.

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All in all a great trip, Wish I had time to do stuff like that more often. 8)[/quote]

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andym
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Re: Motorcycle Racket

Postby andym » Fri Dec 30, 2016 11:17 am

This weekend is drz400 dirt bike weekend!!! Got some dirt to rip up!!! Brrrrraaaaaapppp!!!! Powdered by Japan!!! Brapppp
Andy In Modesto


Maybe Subaru parts could fix it?

68tintop
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Re: Motorcycle Racket

Postby 68tintop » Fri Dec 30, 2016 11:23 am

andym wrote:This weekend is drz400 dirt bike weekend!!! Got some dirt to rip up!!! Brrrrraaaaaapppp!!!! Powdered by Japan!!! Brapppp

I love that sound. I traded my 450 honda for a 58 rag last month. I kinda miss it. But all my buddies are barely walking so it was time to hang it on the wall!! It's a awesome feeling having the throttle in your hand

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andym
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Re: Motorcycle Racket

Postby andym » Tue Jan 03, 2017 7:59 am

Can't beat dirt bike huh Jesse!!

I got up at 3:30 cause I couldn't sleep and headed into work. Taking a break before I get wet and muddy.
Dreaming of bens badass bike,
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Andy In Modesto


Maybe Subaru parts could fix it?

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BBWB
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Re: Motorcycle Racket

Postby BBWB » Tue Jan 03, 2017 8:54 am

^^^Come and get it Andy. Just bring a decent Subi powered Baja. \:D/
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Clatter
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Re: Motorcycle Racket

Postby Clatter » Tue Jan 03, 2017 10:40 am

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\:D/ \:D/ \:D/
If you don't get your project done in a "reasonable" amount of time.. You risk having an "dated" rig.. -John Jones

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Clatter
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Re: Motorcycle Racket

Postby Clatter » Tue Jan 03, 2017 10:48 am

sixfootdan wrote:Image


MMMmmmmm...
Love me a K model.

I'm still tooled up to work on iron Sportys and Ks.
Did just those for a living in a past life; hit me up.

Haven't seen one of those Electric Frank regulators in years!


What are your plans for it?
If you don't get your project done in a "reasonable" amount of time.. You risk having an "dated" rig.. -John Jones

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sixfootdan
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Re: Motorcycle Racket

Postby sixfootdan » Wed Jan 04, 2017 5:23 am

Clatter wrote:
sixfootdan wrote:Image


MMMmmmmm...
Love me a K model.

I'm still tooled up to work on iron Sportys and Ks.
Did just those for a living in a past life; hit me up.

Haven't seen one of those Electric Frank regulators in years!


What are your plans for it?



I put the hardtail back on it I'm going to get it running. It huffs on one cylinder so I'm thinking cam timing or a head gasket. I never really messed with one before.


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