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Re: RB250 SCOOTER SHOOTOUT MOTOR
Posted: Wed Nov 14, 2012 7:33 pm
by Darrell Taylor
eden wrote:Darrell Taylor wrote:just machined it uses the pm conrod 116mm that has a very slim profile ,i believe its same as jb crank so eden has the same i think
Mine is just machined too, no need to weld the back of the casing, when i say machined what i realy mean is trenched out with a square edge 1 inch long stone fitted to my wolf drill
I just took the case out until the crank turned with out catching, strangely though, I had to take a little more out for the JB crank than I had originally taken out for the Tino 62 that fell to pieces.
Darrel, what spec was the motor at this years Mallory test day?
at mallory it was at 35bhp 23 torque and wrong gearing
Re: RB250 SCOOTER SHOOTOUT MOTOR
Posted: Wed Nov 14, 2012 7:39 pm
by Darrell Taylor
been busy this afternoon on it tested different ign timing settings along with jetting actually richening up and found yet more in there
new peak 47.4bhp
Re: RB250 SCOOTER SHOOTOUT MOTOR
Posted: Wed Nov 14, 2012 7:50 pm
by Adam_Winstone
^... nice work
Re: RB250 SCOOTER SHOOTOUT MOTOR
Posted: Wed Nov 14, 2012 9:08 pm
by drunkmunkey6969
Darrell Taylor wrote:been busy this afternoon on it tested different ign timing settings along with jetting actually richening up and found yet more in there
new peak 47.4bhp
What would that be uncorrected? 50?
Re: RB250 SCOOTER SHOOTOUT MOTOR
Posted: Wed Nov 14, 2012 9:09 pm
by drunkmunkey6969
Darrell Taylor wrote:drunkmunkey6969 wrote:Darrell Taylor wrote:cylinder porting started with welding up the triple ex port back to a single port and welding up the 2 boost transfer ports to a single small boost port leaving it a very simple 1 exhaust port 5 transfer port design....
Did you re-angle the boost port also? Made it a bit steeper maybe?
it was just a little less than std
Do you mean less as in angled more towards the exhaust, or less as in steeper towards the head?
Re: RB250 SCOOTER SHOOTOUT MOTOR
Posted: Wed Nov 14, 2012 9:09 pm
by drunkmunkey6969
Adam_Winstone wrote:^... nice work
Understatement....lol
Re: RB250 SCOOTER SHOOTOUT MOTOR
Posted: Wed Nov 14, 2012 9:11 pm
by drunkmunkey6969
drunkmunkey6969 wrote:Darrell Taylor wrote:been busy this afternoon on it tested different ign timing settings along with jetting actually richening up and found yet more in there
new peak 47.4bhp
What would that be uncorrected? 50?
Just read PM......
Re: RB250 SCOOTER SHOOTOUT MOTOR
Posted: Wed Nov 14, 2012 9:15 pm
by RICSPEED
Darrell Taylor wrote:new peak 47.4bhp
needs droping in a group 6 mate
Re: RB250 SCOOTER SHOOTOUT MOTOR
Posted: Wed Nov 14, 2012 9:30 pm
by drunkmunkey6969
RICSPEED wrote:Darrell Taylor wrote:new peak 47.4bhp
needs droping in a group 6 mate
Estimated top speed with a jockey weight pilot in a geared grp6? Lol
Re: RB250 SCOOTER SHOOTOUT MOTOR
Posted: Wed Nov 14, 2012 9:35 pm
by Adam_Winstone
Can I run a clubman on it? (lol)