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post #1 of 53 (permalink) Old 07-22-2019, 08:16 PM Thread Starter
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LSR

i just blew up my 1965 650 triumph LSR machine, at 2 mph under the top speed record for the mile.

LSR is land speed racing. top speed only. nothing else matters. it was messy:



but the crank guy just called and said he has the box with my crank in it on the porch, so we'll see what we can make of the mess.

this machine holds the record for any production-framed triumph bonneville running on gasoline without aerodynamic aids, at 133 in the mile and 135 in mile point five.

we're going back at the end of august.

lol.

i be kevin
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post #2 of 53 (permalink) Old 07-22-2019, 08:42 PM Thread Starter
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here's what an LSR triumph looks like:



LSR bikes are minimalist machines, nothing on them that you can take off. my entire electrical system is an 18-inch 16-gauge wire running from the magneto to the kill switch. no battery, no harness, no alternator, nada y pues nada . . . the ignition on this one is a vintage ARD magneto, fixed advance.

head is worked by rob hall, like all the rest if the fast british bikes in LSR. dual plugs because the compression is 11.75 to 1.

chassis is a 1965 production triumph T120, using 1990 suzuki katana front wheels for both front and rear. the forks are a mongrel of triumph parts from a bazillion years. everything else on the bike is hand-made.

clip-ons are italian tarozzi, as are the rear set footpegs. controls are stock triumph. newby belt drive, stock 4-speed gearbox.

tanks hold 5 litres of fuel, per the american rules. actually 5.100 litres.

tires are goodyear front runners. automobile drag tires for cars. they work well on LSR machines. same front and rear.

when it runs, it goes very fast, when it blows, it costs lots of money.
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post #3 of 53 (permalink) Old 07-22-2019, 09:43 PM
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Hi Kevin,
Are you sure you canít polish out those imperfections in the crankcases!

I was rooting for you to beat Mr Ritchie Rich on his bespoke framed bike, to have the outright record.

It could have been worse, you could have broke the drive chain, or the gearbox, locking up the back end at 130mph.

Luckily you are not hurt.

Please keep us posted on the rebuild progress.

Regards
Peg.

Quick fixes are named after how long they stay fixed, not how long it takes to make them.
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post #4 of 53 (permalink) Old 07-22-2019, 09:45 PM
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Pretty cool bike. Iíve always wanted to go to Bonneville. Good luck.
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post #5 of 53 (permalink) Old 07-22-2019, 10:31 PM Thread Starter
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Quote:
Originally Posted by Rancidpegwoman View Post
Hi Kevin,
Are you sure you canít polish out those imperfections in the crankcases!

I was rooting for you to beat Mr Ritchie Rich on his bespoke framed bike, to have the outright record.

It could have been worse, you could have broke the drive chain, or the gearbox, locking up the back end at 130mph.

Luckily you are not hurt.

Please keep us posted on the rebuild progress.

Regards
Peg.
yo peg

even blown up, this bike is the fastest triumph bonneville that has ever been.

. . . in a factory bonneville frame . . .

. . . on petrol . . .

having said that, i was quite happy to have it blow without much fanfare. i had just run the lights at the mile at 131 mph when the motor slowed for an instant. i chopped the throttle and pulled the clutch, and it blew a second or so after. so i dead-sticked through the mile point five at 95 mph and thence to the firetruck to introduce myself.

a rod bolt had given up. i shift at between 7000 and 8000 on the 3-4 gear change, and perhaps that was too fast. but the bolts had abut 70 runs on them, so if i change every rebuild instead, i might get away with it in the future.

the chassis is fine, and the motor can rise again. we'll see how quick i can do it.

in the meantime, the daughters set a record in overhead cam 250cc production at 101 and 103 mph:


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post #6 of 53 (permalink) Old 07-22-2019, 10:32 PM Thread Starter
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Quote:
Originally Posted by duc96cr View Post
Pretty cool bike. Iíve always wanted to go to Bonneville. Good luck.
2020

if it holds together.
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post #7 of 53 (permalink) Old 07-23-2019, 09:04 AM
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Glad to see you at least made a very thorough job of it!

Get on with it, lad.

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post #8 of 53 (permalink) Old 07-23-2019, 01:44 PM
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Quote:
Originally Posted by speedrattle View Post
yo peg

even blown up, this bike is the fastest triumph bonneville that has ever been.

. . . in a factory bonneville frame . . .

. . . on petrol . . .

having said that, i was quite happy to have it blow without much fanfare. i had just run the lights at the mile at 131 mph when the motor slowed for an instant. i chopped the throttle and pulled the clutch, and it blew a second or so after. so i dead-sticked through the mile point five at 95 mph and thence to the firetruck to introduce myself.

a rod bolt had given up. i shift at between 7000 and 8000 on the 3-4 gear change, and perhaps that was too fast. but the bolts had abut 70 runs on them, so if i change every rebuild instead, i might get away with it in the future.

the chassis is fine, and the motor can rise again. we'll see how quick i can do it.

in the meantime, the daughters set a record in overhead cam 250cc production at 101 and 103 mph:

Congratulations to your daughter, young and very brave.
Regards
Peg.

Quick fixes are named after how long they stay fixed, not how long it takes to make them.
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post #9 of 53 (permalink) Old 07-23-2019, 06:08 PM
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I would imagine it gets pretty hairy at over 130 mph on an old engine. I can reach over 130 mph on my Rocket 111 and have trouble judging distance at over that. My brain is slower than the bike. Keep at it as it is quite an achievement. No one seems to do it in the UK now.. See a few in hillclimbs but nothing like 130 mph.

Now,where did that bit fall off ?
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post #10 of 53 (permalink) Old 07-24-2019, 11:09 AM Thread Starter
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they still race at the pendine sands

https://straightliners.events/index....-sands-records

but i don't know much about the surface or how fast you can go there. i can't find where the records published.

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