Really nice Yammagamma
Moderator: rztom
Really nice Yammagamma
2-stroke for life!!!
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- Posts: 699
- Joined: Mon Dec 28, 2009 12:02 am
- Location: Hartford, CT
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- Posts: 699
- Joined: Mon Dec 28, 2009 12:02 am
- Location: Hartford, CT
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- Moderator
- Posts: 7033
- Joined: Wed Mar 24, 2010 2:20 am
Excuse my flemisch accent 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
after a lot of measuring welded some new engine mounts, no offset sprocket stuff, chaine in line with the rear wheel.
made a new engine cradlle from some alu tube...
getting the right shape
and almost there...
after some welding
with some other parts for a first impression
after that i started to clean/replacing all the other parts (bearings etc)
then it became time to get the engine ready, no special tricks, just the usual stuff
scimmed the head to adjust the squish (1mm)
measuring the port timings for exhaust calculation
looking good
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
in place
made some parts on the lathe for the tubing/radiator
Exhaust time, paper version :
metal version, in the beginning...
and hup...the belly
a few hours later
a day later (Duvel: the best beer in the world)
the hardest part, getting it all together
2 weeks later...
tadaa...
And then, scored a Honda RS250 seat cheap on fleebay, starting with the subframe
after some welding
and tadaa
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...
Find a good spot for the Ignitech
Getting there
Ignition setup
Clocks in place
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
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
Outdoors for the first time
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
Thank you for your attention
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
after a lot of measuring welded some new engine mounts, no offset sprocket stuff, chaine in line with the rear wheel.
made a new engine cradlle from some alu tube...
getting the right shape
and almost there...
after some welding
with some other parts for a first impression
after that i started to clean/replacing all the other parts (bearings etc)
then it became time to get the engine ready, no special tricks, just the usual stuff
scimmed the head to adjust the squish (1mm)
measuring the port timings for exhaust calculation
looking good
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
in place
made some parts on the lathe for the tubing/radiator
Exhaust time, paper version :
metal version, in the beginning...
and hup...the belly
a few hours later
a day later (Duvel: the best beer in the world)
the hardest part, getting it all together
2 weeks later...
tadaa...
And then, scored a Honda RS250 seat cheap on fleebay, starting with the subframe
after some welding
and tadaa
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...
Find a good spot for the Ignitech
Getting there
Ignition setup
Clocks in place
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
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
Outdoors for the first time
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
Thank you for your attention
- alexandros
- Posts: 189
- Joined: Wed Sep 16, 2009 2:35 am
- Location: MD
- Contact:
- RZResurection
- Posts: 1233
- Joined: Sat Jul 15, 2006 9:51 pm
Kick ass build. And you built your own pipes too.
Gonna be an awesome track bike.
Hope you get your wrists back to 100%
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
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
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- Posts: 699
- Joined: Mon Dec 28, 2009 12:02 am
- Location: Hartford, CT
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 framecrazydiablo wrote:Superb build! Is the engine offset in the frame? Is there any negative effect because of that?
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- Posts: 699
- Joined: Mon Dec 28, 2009 12:02 am
- Location: Hartford, CT