TOPIC:

This engine is finished! I did a bench test and its making 180PSI on both cylinders, with no starter clutch slippage!

couple things from the final assembly: A bootleg rotor holder i made out of an old drill vise I use for welding and a kz1000 tappet holder i adapted to the KZ750 so i can swap shims without removing the cams. gonna try and slap this sucker together tonight.

180 psi is good and it probably increase during break in.


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very nice.

leon

Engine is in the frame and everything is going back together. I installed the new RS34 carbs. I would like to retain the airbox, so I made these Delrin flanges to lengthen the carb body to fit with the airbox boots. This got me looking at the airbox itself. The K&N filter looks like it can flow plenty of air, but the cap that holds the filter on has a long down tube which is quite narrow in diameter (40mm). I'm thinking about trimming this all the way back to the cap and making the opening there as wide as it can be and still hold the air filter (about 55mm)

Worst case scenario I end up using pods but I would prefer to use the airbox if i can. Thoughts?

Crap, the petcock is right where the throttle cables now live.

Can you move the throttle hardware to the other carb body so it's in the middle of the pair? It kind of looks like the mounting bosses are on the other body.

Or maybe replace the fuel valve with a tiny elbow, and use an inline valve.

www.amazon.com/Motion-Pro-12-0036-Inline-Valve/dp/B000WJA33I

My GPz750 airbox has the same type of inlet for the filter. I cut it shorter and drilled larger holes through it as well.

Thanks for the responses

DOHC wrote: Can you move the throttle hardware to the other carb body so it's in the middle of the pair? It kind of looks like the mounting bosses are on the other body.

Or maybe replace the fuel valve with a tiny elbow, and use an inline valve.

www.amazon.com/Motion-Pro-12-0036-Inline-Valve/dp/B000WJA33I

All the shafts are drilled for the throttle to be on the outside, I might be able to move it to the middle but it would take some fabrication. If i cant ind an easier solution I will check it out.

I thought about using a in-line valve but then I would loose the reserve feature which is a bummer on a street bike. I think a different petcock might work, it only needs a little bit of clearance for the cable to squeeze by.

ThatGPzGuy wrote: My GPz750 airbox has the same type of inlet for the filter. I cut it shorter and drilled larger holes through it as well.

I just chopped the whole thing off for now. I'm toying with the idea of fitting a bigger filter in the stock airbox with a custom cap.

I’m takin this bike on a road trip this summer so I fabricated a luggage rack, crash guards, and a better kickstand. Also got it running. The video really kill’s the sound. Makes it sound a bit “ farty”.

Sadly this will have to sit for 2 months until I’ll be able to ride it. I accepted an amazing job in LA so This will be in storage for a bit while I move. The bitter sweet part is I will loose access to all the cool tools I have had at my disposal. I have been working 1 or 2 days a month at my old college to retain access to their shops. That’s all going to stop now

She will make a good mountain bike.
Cool parts Doc, are they stainless? I couldn't get the vid up?
Congrats on the new job good luck!

DoctoRot wrote:

Of all the cool parts of this build, I think the timing cover is my favorite detail. I just went back through the whole thread to try to find where you got it, and it turns out you both designed it and CAST! it yourself. That's crazy cool.

I recently found a vintage patch of the flag with the river symbol, and I'd like to put this onto a project at some point. Any chance you'd be willing to share your CAD model with me?

bluej58 wrote: She will make a good mountain bike.
Cool parts Doc, are they stainless? I couldn't get the vid up?
Congrats on the new job good luck!

Not sure why the video didnt work last time. I entered the URL again and seems to be working now.

The rack is just regular mild steel, the crash guards and kickstand are chromoly. I'm going to polish the butt welds back on the crash-guards so they are seamless and then everything will get powder coated.

DOHC wrote:

DoctoRot wrote: . Any chance you'd be willing to share your CAD model with me?

Thanks man. PM your email address and I'll send it over.