2nd RZ and Aprilia RS/RZ hybrid build (NEW UPDATES)

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Questo vecchio rz · #181 Post by **Questo vecchio rz** » Wed Jan 09, 2019 11:33 pm

kobra wrote: ↑Wed Jan 09, 2019 9:23 pm Incredible work. Does it really matter if the two pistons/rods are exactly the same weight?

Ask any championship AMA/WSBK/Endurance etc...crewcheif, and that question will be part of the answer

motosapien · #182 Post by **motosapien** » Thu Jan 10, 2019 1:52 pm

kobra wrote:Incredible work. Does it really matter if the two pistons/rods are exactly the same weight?

Great question, back in my undergrad there was a chapter on "balancing of rotation masses" in design of machines course. From what I can remember a good example is having an unbalanced wheel on a car that cause vibration at a particular speed of rotation.

motosapien · #183 Post by **motosapien** » Thu Jan 10, 2019 3:07 pm

Radiator fitting and clearance under full suspension compression

Jessy · #184 Post by **Jessy** » Sun Apr 07, 2019 8:02 am

That rad looks great, hopefully I will be starting a similar project soon, is there plenty of clearance with fairing on?
Jess

MK · #185 Post by MK » Mon Apr 08, 2019 11:07 am

Give it some 2 cm additional clearance as the tire will grow at speed and the fork will flex under braking!
And don't ask why I happen to know that.

evan_calgary · #186 Post by **evan_calgary** » Mon Apr 08, 2019 1:47 pm

Questo vecchio rz wrote: ↑Wed Jan 09, 2019 11:33 pm
kobra wrote: ↑Wed Jan 09, 2019 9:23 pm Incredible work. Does it really matter if the two pistons/rods are exactly the same weight?
Ask any championship AMA/WSBK/Endurance etc...crewcheif, and that question will be part of the answer

No it does not matter. You are not dealing with high end racing stuff compared to stated above. There is up to a mm in head clearance range accounted for in the additional squish included in these motors. Do you think there is any chance they checked cranks and rods down to the gram? No, no chance in ever.

A properly balanced engine will run smoother and may last slightly longer but you are dealing with such marginal amounts over the life of a motor it is NOT MATERIAL.

It does feel nice to get things as near to perfect as possible when building.

Your build is looking great. I am jealous! High end components I wish I had on my more budget RS350 build..

motosapien · #187 Post by **motosapien** » Mon Apr 08, 2019 2:19 pm

Jessy wrote:That rad looks great, hopefully I will be starting a similar project soon, is there plenty of clearance with fairing on?
Jess

Sadly the nsr250 radiator was a bit wide and rubbing against the body work. Also the height was longer and header pipes angle was not ideal. So switched to rgv250 radiator.
This one looks promising and the plumbing looks easier.

motosapien · #188 Post by **motosapien** » Mon Apr 08, 2019 2:30 pm

Also the progress has been slow and Ed is busy with other projects.
Here are some case mods and wiring pics

Questo vecchio rz · #189 Post by **Questo vecchio rz** » Tue Apr 09, 2019 2:27 pm

It's all good, is what it is, Toomey is assembling your motor and matching components down to the gram, and your crankwork, is about as good as it gets.

Your motor is being assembled basiclly by a Nationall championship /GP level engineer , Whom has 100s of titles and was a winner of the Daytona 500, in addition contracted by Yamaha and Honda HRC/HSC as engineer/tuner alongside Erv Kanemoto for Freddie Specer and has tuned/engineered for many others Ballingtion ,Rainey and Bubba Shobert and Gene Romero.
Like the famed builder Tony Scott did for the Honda RC30s balancing ,/ matching every single part of a motor, makes a superior performer and championship level engine. Guys like these and Stewart and Ed and other perfectionists... make even factory race bikes even more reiable and faster, It's seperates them from the boys.
One reason progress is slow.... these guys are not spring chickens anymore...your lucky to even get folks like them to do work.
I've keeping my fingers crossed & got a similar project being hatched soon ....I hope? By a gentelnman with a similar pedegriee. Hopefully it works out, I can't wait to find out details, hopefully in a couple weeks I'll have some insight.
Does a perfect motor really matter? Perhaps not to a non championship type rider, or enthusiast but it's cool bragging rights and kinda fun to have that level of work none the less,
Under racing conditions it's more powerful & reliable, if intended for a track day street bike, could likley be the last motor you'll never build for her, depending upon your level of abuse. I'm assuming it's not a full tilt race motor, single ring etc...
Gary @ Spec 2 another talented engineer many moons ago, built me a pretty strong 375cc RZ motor that lasted 20,000+ hard street miles...bottom line is your getting some of the best craftwork in your motor you can buy.
Great build keep the details coming.

motosapien · #190 Post by **motosapien** » Tue Apr 09, 2019 8:13 pm

Thanks! Ed is actually building the whole bike, including motor, suspension, brakes electrical, pipes and is even painting the bike

motosapien · #191 Post by **motosapien** » Tue Apr 16, 2019 6:22 pm

Yesterday's update from ed. Suspension off the bike...sent back to ohlins for a rebuild

motosapien · #192 Post by **motosapien** » Tue Apr 16, 2019 6:25 pm

CF dash mounting bracket for the translogic

petros67 · #193 Post by **petros67** » Sun Apr 21, 2019 6:01 am

Top project this bike !!!
Love it and can't wait to see this completed.

motosapien · #194 Post by **motosapien** » Wed Aug 14, 2019 1:56 pm

Ed was not happy with the engine mounting bracket locations, so he went ahead and welded new ones to get it right.

New MUPO rear shock installed

A custom aluminum subframe is being made to replace the heavy steel one

Front shocks rebuilt at ohlins Hendersonville and back on the bike

Front calipers rebuild with new seals and pistons.

Carbon fiber end can and custom pipes will be finished soon.

It's all coming together we'll

Can't wait to hear it

motosapien · #195 Post by **motosapien** » Wed Aug 14, 2019 1:57 pm

More pics can be found here

https://photos.app.goo.gl/rZXU2UECuGbqkE4k7

RZ/RD 350 & Misc. 2-Stroke Tech BBS

2nd RZ and Aprilia RS/RZ hybrid build (NEW UPDATES)

Re: 2nd RZ and Aprilia RS/RZ hybrid build (NEW UPDATES)

Re: 2nd RZ and Aprilia RS/RZ hybrid build (NEW UPDATES)

Re: 2nd RZ and Aprilia RS/RZ hybrid build (NEW UPDATES)

Re: 2nd RZ and Aprilia RS/RZ hybrid build (NEW UPDATES)

Re: 2nd RZ and Aprilia RS/RZ hybrid build (NEW UPDATES)

Re: 2nd RZ and Aprilia RS/RZ hybrid build (NEW UPDATES)

Re: 2nd RZ and Aprilia RS/RZ hybrid build (NEW UPDATES)

Re: 2nd RZ and Aprilia RS/RZ hybrid build (NEW UPDATES)

Re: 2nd RZ and Aprilia RS/RZ hybrid build (NEW UPDATES)

Re: 2nd RZ and Aprilia RS/RZ hybrid build (NEW UPDATES)

Re: 2nd RZ and Aprilia RS/RZ hybrid build (NEW UPDATES)

Re: 2nd RZ and Aprilia RS/RZ hybrid build (NEW UPDATES)

Re: 2nd RZ and Aprilia RS/RZ hybrid build (NEW UPDATES)

Re: 2nd RZ and Aprilia RS/RZ hybrid build (NEW UPDATES)

Re: 2nd RZ and Aprilia RS/RZ hybrid build (NEW UPDATES)