speedrattle
Well-Known Member
hey. i just noticed that there isn't a competition thread in this forum.
competition on these old beasts is a blast.
i ran across this old video of my 1965 (mostly) triumph 650 bonneville doing 134 mph at the land speed races in maine, usa. its a pretty heavily modified 4-speed in a factory frame, with all-triumph general components, except for
- billet crankshaft, MAP steel rods, JE pistons, 11.75-1
- rob hall ported 9 1/2-bolt head, OS intake and exhaust valves
- kibblewhite valves, tappet blocks, pushrods, springs, collars, keepers
- absolutely stock rocker boxes, except for mushroom adjusters and dural lock nuts
- megacycle 510-x2 camshafts, 106/109 lobe centers
- newby 40mm belt drive 36/68
- 21/43 final drive . . . i think. ive run 20 and 21, also 43 and 46.
- 35mm keihin FCRs, 145 mains i think
- disc brake triumph front end, less the disc brake
- silly unit rear drum brake, but you don't use the brake when racing, just to stop at the pits
- tarrozzi adjustable clip ons
- tarrozzi adjustable rear sets
- continental classic attack tube tires
- ARD magneto ignition, set at 30 BTDC because i'm running a twin plug head, with morris magneto diode plug wires
- thats all i can remember
View: https://www.youtube.com/watch?v=NikCMxSBbcs
this was a record run at the time, but the machine has since run faster than this, at 135-plus. ive since raised the gearing so i don't have to run at 8000-plus rpm, as i did here, although the motor is quite happy to do it.
i'd like to see 140 mph, which historically has been an unattainable speed on an unfaired 650 triumph on gasoline.
so far.
if you run any of your old machines in competition, feel free to post here. or if you come across anything interesting that you think would fit, go for it.
this is what 135.259 mph has to look like on a vintage triumph bonneville
-
competition on these old beasts is a blast.
i ran across this old video of my 1965 (mostly) triumph 650 bonneville doing 134 mph at the land speed races in maine, usa. its a pretty heavily modified 4-speed in a factory frame, with all-triumph general components, except for
- billet crankshaft, MAP steel rods, JE pistons, 11.75-1
- rob hall ported 9 1/2-bolt head, OS intake and exhaust valves
- kibblewhite valves, tappet blocks, pushrods, springs, collars, keepers
- absolutely stock rocker boxes, except for mushroom adjusters and dural lock nuts
- megacycle 510-x2 camshafts, 106/109 lobe centers
- newby 40mm belt drive 36/68
- 21/43 final drive . . . i think. ive run 20 and 21, also 43 and 46.
- 35mm keihin FCRs, 145 mains i think
- disc brake triumph front end, less the disc brake
- silly unit rear drum brake, but you don't use the brake when racing, just to stop at the pits
- tarrozzi adjustable clip ons
- tarrozzi adjustable rear sets
- continental classic attack tube tires
- ARD magneto ignition, set at 30 BTDC because i'm running a twin plug head, with morris magneto diode plug wires
- thats all i can remember
View: https://www.youtube.com/watch?v=NikCMxSBbcs
this was a record run at the time, but the machine has since run faster than this, at 135-plus. ive since raised the gearing so i don't have to run at 8000-plus rpm, as i did here, although the motor is quite happy to do it.
i'd like to see 140 mph, which historically has been an unattainable speed on an unfaired 650 triumph on gasoline.
so far.
if you run any of your old machines in competition, feel free to post here. or if you come across anything interesting that you think would fit, go for it.
this is what 135.259 mph has to look like on a vintage triumph bonneville
-
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