Question For Wisco Piston Kit Users

[TopCatGr58]

Hey Rob,

Glad to hear there wasn't any real fire where there was smoke!

You'll want to check the cam cover bolts in a few weeks cause the gasket can shrink after Xposure to the heat of the head!

IIRC, the instructions that came with my "baby Bore" kit recommended the retorque process. Also I think the bike machine shop said to retorque as well, as has been said, won't hurt!
T.C.

[79XS11F]

Well I was worried that perhaps I had FRIED something right off the bat so I am relieved to say the least.
Rob

[79XS11F]

Today I torqued the valve cover bolts, setup the timing, synced the carbs and set the idle. The engine is running smooth and sounds GREAT. Starting to see some smoke out the exhaust now but it goes away as soon as the throttle is given even a little twist. So unless something happened once the bike is put into use all seems to be OK in relation to the 1179 kit install.
Rob

[79XS11F]

ALL IS GOOD :-)

I'm just in from a ride and the bike is as smooth as glass in spite of what I was sure was going to be a trany issue. She shifts very nice and smooth through all gears and everything seems to be A OK

[79XS11F]

I was out last night for a 50 some odd KM spin around town and the engine is running NICE. I bike sounds GREAT. It has a lower pitched growl or rumble as compared to the stock setup. The trany is shifting very smoothly through all gears and this I know because i have been switching gears a lot to keep those RPMs on the move. I have twisted her up to as high as 7000 RPMs in short little bursts and she pulls strong over 6000 RPM but some fine tuning is still required. She remains COLD blooded. Idle is always faster when the engine is warmed up so I guess I will twist the idle set screws out a little more. I'm already using #145 pilot jets.
She seems pretty flat on the power curve in the 4000 to 6000 RPM range. In that range if I give her a twist she makes a lot of noise but acclaration is almost completely FLAT. Perhaps she needs more fuel and adding to the pilot adjustment may just help that area out.
I can say one thing that I did notice ... With only 60 some odd KMs on this engine she is already pulling better then when first used. I gave her a twist from a fresh green light on the highway and found myself being moved back on the seat which has NEVER happened in the past.
Rob

[pggg]

79, 4000 revs is the pilot to main circuit crossover point, where the butterfly is opening enough to drag in more and more airflow over the emulsion tube, which in turn starts hauling in the petrol, you don't need to go over a 45 pilot jet on these carbs, a fraction higher float level is an option, but going up another size on the main jet is also an option, as is raising the slide needle a notch, I'd go for a main jet increase myself, also if you have individual filters or modded airbox, you might want to snip a couple of coils off the diaghram springs and/or drill the slide hole out to 3mm which shouldl cure any sluggish or delayed slide response.

[79XS11F]

Thanks for that input pggg. When you say to drill out the slide hole your referring to the hole on the bottom of the slide itself right? Main jet sizes increase at .5 at a time?
Rob

[pggg]

79, just the small hole in the bottom of the slide, yeah, from memory they're 2mm diameter, mine are drilled to 2.5mm, you wouldn't want to go over 3mm, the jets go up by 2.5 increments eg.. 140 to 142.5 etc.. but Rob that dial -a - jet thingy, I'd be tempted to throw it in the nearest garbage compactor before you start tweaking the carbs again.

[79XS11F]

I do in deed have questions about the dial a jet thingee but all the research I did on it is very positive. I am supposed to go with what ever would be normal jetting for my mods but reduce the main jet by one or 2 sizes so that the dial a jet system can work properly. So for next spring i think i will in deed go with the jetting that would be normal for my bikes setup except for the main jet which i will go one size lean on. Oh by the way ... Where can I get main jets for these carbs?
Rob

[John]

Any bike shop will have, or be able to get you OEM Mikuni jets. You can do a search here, and find the names of the places that have them online. I think there is even a website called "jetsrus.com" I followed a link to them from here.

[79XS11F]

Thanks John That's helpful. i was sure I had seen some posts that gave me the impression that finding jets would be an issue. I'm glad that's not the case.
Rob