Brooking 850
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- Joined
- Oct 3, 2011
- Messages
- 1,612
Hi all, have finally had the '73 850 running, first start last Saturday and a few back country road runs Sunday.
Hoping to have it on the Dyno this week as I am running a set of JS motorsport flatslides until my Amals arrive later this week.
Have to run Amals to make class with the classic racing register here in New Zealand.
First race Saturday all going well.
Basic list as follows:
850 1973 motor bored to +0.040"
JS Motorsport rods and pistons, stage 2 cam, followers, push rods and beehive valves
KW valves 1.5mm oversize. Corrective porting in the RH10 head to suit both sets of manifolds.
Crank balanced to 63% and crack tested
Rex Caunt crank mounted ignition using and old inner primary case and realigned alternator posts to mount.
Modified outer primary cover to protect the ignition
Rev limited to 7500 rpm and set at 32 degrees full advance.
5 speed TTI gear box , although they send the wrong configuration , I got 1 dowm 4 up instead of 1 up 4 down, Bruce at TTI is helping me with that and hopefully resolved before Friday!!
Std frame and forks, some Lansdowne fork inserts , JS trucite sliders, Maddass tank, one piece rear axle and master cylinder sleeve.
Fibreglass seat base shortened to suit shortened rear frame loop.
Rear hub modified so as to be able to change gear ratios quickly.
I use a NZ made pit starter to fire it, it takes very little to get it running and was running on the fist few spins with the starter!!!
Headers are by Viking Exhausts , OEM mufflers until I do some dyno runs and get a designed exhaust made at some time.
It is a start and bulit to last and have fun on while racing.
Thanks to all on the forum who have given plenty of advice, you will know who you are from emails amd PM's
Thanks and regards Mike
more pics in the library link below main pic
http://s1228.photobucket.com/user/Brook ... t=3&page=1
Hoping to have it on the Dyno this week as I am running a set of JS motorsport flatslides until my Amals arrive later this week.
Have to run Amals to make class with the classic racing register here in New Zealand.
First race Saturday all going well.
Basic list as follows:
850 1973 motor bored to +0.040"
JS Motorsport rods and pistons, stage 2 cam, followers, push rods and beehive valves
KW valves 1.5mm oversize. Corrective porting in the RH10 head to suit both sets of manifolds.
Crank balanced to 63% and crack tested
Rex Caunt crank mounted ignition using and old inner primary case and realigned alternator posts to mount.
Modified outer primary cover to protect the ignition
Rev limited to 7500 rpm and set at 32 degrees full advance.
5 speed TTI gear box , although they send the wrong configuration , I got 1 dowm 4 up instead of 1 up 4 down, Bruce at TTI is helping me with that and hopefully resolved before Friday!!
Std frame and forks, some Lansdowne fork inserts , JS trucite sliders, Maddass tank, one piece rear axle and master cylinder sleeve.
Fibreglass seat base shortened to suit shortened rear frame loop.
Rear hub modified so as to be able to change gear ratios quickly.
I use a NZ made pit starter to fire it, it takes very little to get it running and was running on the fist few spins with the starter!!!
Headers are by Viking Exhausts , OEM mufflers until I do some dyno runs and get a designed exhaust made at some time.
It is a start and bulit to last and have fun on while racing.
Thanks to all on the forum who have given plenty of advice, you will know who you are from emails amd PM's
Thanks and regards Mike
more pics in the library link below main pic
http://s1228.photobucket.com/user/Brook ... t=3&page=1