Really nice Yammagamma

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Rz421rr
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Really nice Yammagamma

#1 Post by Rz421rr » Tue Aug 31, 2010 5:05 am

2-stroke for life!!!

crazydiablo
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#2 Post by crazydiablo » Tue Aug 31, 2010 6:32 am

Thats very nice, i found a build thread or photbucket somewhere.

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Vollegaaz
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#3 Post by Vollegaaz » Wed Sep 01, 2010 4:42 pm

:smt017 hey, thats me... :smt003

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Rz421rr
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#4 Post by Rz421rr » Wed Sep 01, 2010 7:04 pm

Vollegaaz wrote::smt017 hey, thats me... :smt003
LOL
2-stroke for life!!!

crazydiablo
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#5 Post by crazydiablo » Thu Sep 02, 2010 12:08 am

Then you have to show us more photos or a build thread.

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Vollegaaz
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#6 Post by Vollegaaz » Thu Sep 02, 2010 2:16 am

ok will do soon. :smt006

silverstrom
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#7 Post by silverstrom » Thu Sep 02, 2010 2:30 am

Looking forward to seeing pix.

I like that avatar of yours. Reminds me of my ex-wife's mother.

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Vollegaaz
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#8 Post by Vollegaaz » Thu Sep 02, 2010 2:31 am

loll :smt003

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Vollegaaz
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#9 Post by Vollegaaz » Thu Sep 02, 2010 8:28 am

Excuse my flemisch accent :smt003 and the quality of some pics

Gonna skip some details, but here we go:

A few Years ago i bought 2x RZ350, but didn't have the time to do something with it.
After a crash on the track with my gixxer1000 i distroyed my wrist, so it became very difficult to ride.
The time was right to build myself a lightweight bike, and at this point the RZ's came up again.

The original plan was to upgrade an RZ350ypvs with some "up to date" parts, and some time later i layed my hands on a RGV VJ22, without engine but very cheap.
Instead of the usual stuff (swing and front end in the RZ) i decide to go the other way and put the RZ engine in the RGV frame :-)

some points to remember: low budget and wanted to do it all by myself, so no high tech skills :-)

Started with cleaning up the frame

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after a lot of measuring welded some new engine mounts, no offset sprocket stuff, chaine in line with the rear wheel.


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made a new engine cradlle from some alu tube...


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getting the right shape


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and almost there...


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after some welding


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with some other parts for a first impression



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after that i started to clean/replacing all the other parts (bearings etc)



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then it became time to get the engine ready, no special tricks, just the usual stuff


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scimmed the head to adjust the squish (1mm)


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measuring the port timings for exhaust calculation


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looking good


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Now with the engine in place, it became time for the rest, started with the PV motor
Welded some attachements at the bottom of the tank stay


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in place


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made some parts on the lathe for the tubing/radiator


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Exhaust time, paper version :


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metal version, in the beginning...


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and hup...the belly


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a few hours later


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a day later (Duvel: the best beer in the world)


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the hardest part, getting it all together :-)


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2 weeks later...


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tadaa...


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And then, scored a Honda RS250 seat cheap on fleebay, starting with the subframe


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after some welding


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and tadaa

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Next step, the electrics/wiring, bought the first new part, an Ignitech CDI unit, it's cheap and easy programmable (www.ignitech.cz)
it controls the ignition and Power valve, i decide to leave the flywheel for what is was, and gonna use a 2Lobe rotor instead:
power consumption form the battery (the bike will only be used on trackdays, no lights and stuff)


some drawing...


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Find a good spot for the Ignitech


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Getting there


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Ignition setup


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Clocks in place


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Battery and holder in place yup i know it's a giant battery, bit of a compromise. Should hold a trackday and i got it for free :-)


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and then, the big moment, i've put a kind of standard mapping in the ignitech unit and some fuel,
can i kick it, yes i can...2 kicks later
(video shot with mobile phone as i was surprised it started so quick)


http://www.youtube.com/watch?v=Kfnd82Oj5BM


After that, time for some painting


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Outdoors for the first time

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And finaly, a first little testride.
Nevermind the low revs, ignition was a bit late in de low revs, fixed now.
The clutch could'nt hold the power, but anyway the ride was quite satisfactory.

http://www.youtube.com/watch?v=yVHnCF44kDw&NR=1


At this moment the project is on a break because of surgery on my wrist.

Things to do:

Clutch
Bodywork (I'm looking for a TZ or a Honda RS fairing)
Dyno run

To be Continued :smt006


Thank you for your attention :smt003

stu
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#10 Post by stu » Thu Sep 02, 2010 8:53 am

really awesome, well done!

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alexandros
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#11 Post by alexandros » Thu Sep 02, 2010 10:14 am

badass!!

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RZResurection
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#12 Post by RZResurection » Thu Sep 02, 2010 10:15 am

Kick ass build. And you built your own pipes too.
Gonna be an awesome track bike.

Hope you get your wrists back to 100%
Jeff

Trying to build a bike that's as fast as my memories
87 Canadian 1WV
OEM Pipes
Gutted Airbox
VF4 Reeds
Milled Head (0.020")
Main 240
Pilot 27.5
02 R1 Front End
R6 Shock and Rims (180 Rear Tire)
84 FJ1100 Swingarm

crazydiablo
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Location: Hartford, CT

#13 Post by crazydiablo » Thu Sep 02, 2010 11:29 am

Superb build! Is the engine offset in the frame? Is there any negative effect because of that?

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Vollegaaz
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#14 Post by Vollegaaz » Thu Sep 02, 2010 12:21 pm

crazydiablo wrote:Superb build! Is the engine offset in the frame? Is there any negative effect because of that?
When you put a RGV banana Swing in an RZ frame, you have an offset of 7mm, but in this case i could line up the whole engine, so those 7mm to the right side would not be a problem i think. Both cilinders match perfect in the frame

Image

crazydiablo
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Location: Hartford, CT

#15 Post by crazydiablo » Thu Sep 02, 2010 12:48 pm

Superb, so basically if you use a RGV frame there is no need for an offset sprocket.

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