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Re: RZ Frame modified MOTO3 project
Posted: Wed Oct 10, 2018 8:16 pm
by ulsterman
it s different motor and fires every rotation using cams and injection
Re: RZ Frame modified MOTO3 project
Posted: Thu Oct 11, 2018 6:10 pm
by JanBros
dificult to see, but front and rear valves open at the same time ?
when are the 4 strokes suppost to happen when the valves open each revolution ?
Re: RZ Frame modified MOTO3 project
Posted: Thu Oct 11, 2018 9:34 pm
by ulsterman
Yes first the induction side and then the exhaust side on a four stroke ------This is a double lobe cam and open one behind the other at 30 deg apart for all in one rotation
Re: RZ Frame modified MOTO3 project
Posted: Sun Dec 09, 2018 10:55 pm
by ulsterman
https://www.facebook.com/photo.php?fbid ... =3&theater
https://www.facebook.com/photo.php?fbid ... =3&theater
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New ---Microsquirt-ECU----With lots of Corvette sensors and stuff so we will see if this does the trick -Fingers crossed and yes i am getting tired of this to
Re: RZ Frame modified MOTO3 project
Posted: Mon Dec 10, 2018 6:38 pm
by Smoker
What 4-stroke engine are you using?
When will you be testing the new design?
Sounds like you've turned a 4-stroke into a 2-stroke.
Not sure I understand, but I like it!!
Re: RZ Frame modified MOTO3 project
Posted: Tue Dec 11, 2018 12:33 am
by ulsterman
The Donor Motor was a CBR250R which keeps it the FIM range for the Class
It has alot of other different links and hopefully next two wks the new ECU will give it a try -fingers crossed
Re: RZ Frame modified MOTO3 project
Posted: Sat Apr 20, 2019 1:55 pm
by ulsterman
https://www.ebay.ca/itm/RZ-350-Yamaha-R ... uU&vxp=mtr
One of the 3 Race Frames i made and to be honest the best of the 3 in my mind
Thanks for looking
Re: RZ Frame modified MOTO3 project
Posted: Fri Oct 04, 2019 6:04 pm
by ulsterman
Well both machine have made it home to Northern ireland and hopefully the Moto 3 will be ready for next season
https://www.facebook.com/photo.php?fbid ... =3&theater
Re: RZ Frame modified MOTO3 project
Posted: Tue Aug 25, 2020 6:51 pm
by ulsterman
https://www.youtube.com/watch?v=eahmaJd ... e=youtu.be
Finally got the bike back and after some issues bought an oscillascope and found the problems and this is the first test run of the 3 stroke motor in action ----You can hear at idol the double pulze of the Motor
Re: RZ Frame modified MOTO3 project
Posted: Wed Oct 07, 2020 6:23 am
by ulsterman
https://www.youtube.com/watch?v=i5hLgxTH9-8
Well Finally after all this time the motor runs to 12,000 and after a tidy up will be heading to the track
Will post a completed Video sometime soon
Thank yous all for watching this thread and its been testy but i got there and hopefully a whole new direction for motors
Still got my big RZ400 and that needs fuel injection done to lol
Again thnnkyou
Re: RZ Frame modified MOTO3 project
Posted: Wed Oct 07, 2020 6:44 am
by Smoker
Re: RZ Frame modified MOTO3 project
Posted: Wed Oct 07, 2020 9:52 am
by ulsterman
Thank you just fixed the setting and hopefully works ok now
Re: RZ Frame modified MOTO3 project
Posted: Wed Oct 07, 2020 1:04 pm
by tacky1
Sounds great, Cant wait to see a video of it on the track...
Re: RZ Frame modified MOTO3 project
Posted: Wed Oct 07, 2020 1:18 pm
by Smoker
Video works now.
Engine sounds wicked!!
Not like any thumper I've ever heard.
Re: RZ Frame modified MOTO3 project
Posted: Thu Oct 08, 2020 7:25 am
by MK
To be honest, it doesn't sound like a powerful engine.
It doesn't pick up revs very dynamically.
More like a lame duck that stalls immediately when not on the throttle.
Are there any performance curves available, i.e. is there any gain compared to the same engine being a normal 4 stroke?