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April 18, 2014, 05:49:22 AM

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Author Topic: ANYONE BUMP START ? Comments? technique?  (Read 374 times)

Craig McClure

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ANYONE BUMP START ? Comments? technique?
« on: February 01, 2014, 06:39:08 PM »
As a forum about an essentially British style bike. I was wondering if any members routinely BUMP START their machines - or even know how?  I did this many times in my younger years, mostly when I Owned a Bultaco Metralla, & a Greeves Scotish Trials. They were 2 stroke 250cc singles, with very awkward kick start mechanisms. They were light enough to just put in second gear, run a few steps, hop on, & dump the clutch. Every one develops their own technique. The old time racers would back their bikes into a compression stroke in second gear, run, jump up & perch side-saddle, as they dumped the clutch.
I was never comfortable with the side saddle posture, so would push from the left side in second gear, run, then- with left foot on peg-Right Knee on the saddle, dump the clutch.
  I did this at Wal Mart last year when I had battery trouble, my right knee is no longer up to kick starting, & complained plenty about running my G5. But if you think kick starting amuses bystanders, It,s nothing compared to a white haired old guy Bump Starting a vintage looking bike. I bought a better battery right away.
Best Wishes, Craig McClure

Royalista

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Re: ANYONE BUMP START ? Comments? technique?
« Reply #1 on: February 01, 2014, 06:45:47 PM »
I hope the audience rewarded you with an applause. You deserved it.  :D
moriunt omnes pauci vivunt

Rich Mintz

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Re: ANYONE BUMP START ? Comments? technique?
« Reply #2 on: February 01, 2014, 07:36:19 PM »
I've done it with my 2010 C5. Run along from the left side in second gear with the clutch in, build up some speed, then let out the clutch and at the same time apply the hand brake (so the bike doesn't get out of my hands)...

Riding my SYM Symba (Honda Cub) in very cold weather, which dies at idle when really cold, I have to essentially bump-restart it each time i slow down, by downshifting hard into first gear...

Ducati Scotty

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Re: ANYONE BUMP START ? Comments? technique?
« Reply #3 on: February 01, 2014, 08:17:18 PM »
I've done it several times when the battery was dead.  Switches on, second gear, clutch in.  Push, hop on, dump the clutch and a little gas.  Works well enough but much easier on a hill ;)  It's critical to be sitting on the bike or you won't have enough weight and the tire just skids.

Scott

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Re: ANYONE BUMP START ? Comments? technique?
« Reply #4 on: February 01, 2014, 08:47:29 PM »
I run with the bike neutral get some speed and in one motion pull the clutch jump on kick it in gear and bounce on the seat as I dump the clutch.  The bouncing and dumping at the same time helps keep the tire from sliding instead of rolling the motor over.  Very necessary for bump starting on dirt.

Scottie


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Arizoni

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Re: ANYONE BUMP START ? Comments? technique?
« Reply #5 on: February 01, 2014, 10:37:12 PM »
I bet if more people did some bouncing while they were dumping they wouldn't need their Ex Lax.  ;D
Jim
2011 G5 Deluxe
1999 Miata 10th Anniversary

High On Octane

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Re: ANYONE BUMP START ? Comments? technique?
« Reply #6 on: February 02, 2014, 06:54:04 AM »
I bet if more people did some bouncing while they were dumping they wouldn't need their Ex Lax.  ;D

LMAO  Damn It!  I'm always setting myself up!  LOL


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motomataya

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Re: ANYONE BUMP START ? Comments? technique?
« Reply #7 on: February 02, 2014, 09:30:06 AM »
The official race track technique is to back  the bike up in second gear against compression. Put it in neutral, push as fast as you can, pop it into second gear, WITHOUT TOUCHING THE CLUTCH. If you pull in the clutch and put it in gear the motor will tend to roll forward, so you won't build momentum in the flywheels.

Blltrdr

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Re: ANYONE BUMP START ? Comments? technique?
« Reply #8 on: February 02, 2014, 02:27:24 PM »
The official race track technique is to back  the bike up in second gear against compression. Put it in neutral, push as fast as you can, pop it into second gear, WITHOUT TOUCHING THE CLUTCH. If you pull in the clutch and put it in gear the motor will tend to roll forward, so you won't build momentum in the flywheels.

Good point!
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gremlin

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Re: ANYONE BUMP START ? Comments? technique?
« Reply #9 on: February 02, 2014, 03:22:12 PM »
............  I did this at Wal Mart last year when I had battery trouble, ....... a white haired old guy Bump Starting a vintage looking bike. .......

Downright normal - compared to some of the Wal-Martians I've seen !
1996 Trophy 1200
2011 RE B5
1979 XS11 w/vetter terraplane
1981 XS11 streetfighter
1983 Venture Royale
1982 CB750K
1971 Triumph Trident
1969 CB450
1966 Sears (puch) 250


GA-DK

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Re: ANYONE BUMP START ? Comments? technique?
« Reply #10 on: February 02, 2014, 03:30:42 PM »
I don't use bike much in cold weather.  I may only run the 1/4 mile to mailbox to get papers in the morning.  This is better than climbing the hill on the drive, but after a week or so, I worry about taking too much out of the battery.  I can coast from the garage to the steep part of the drive, then pop the clutch and bump start.  GA-DK

Gypsyjon

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Re: ANYONE BUMP START ? Comments? technique?
« Reply #11 on: February 02, 2014, 04:47:09 PM »
Back in my flat tracking days we used to push each other to bump start.
I've gone back to my roots. British 1 lunger, stump puller.

mattsz

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Re: ANYONE BUMP START ? Comments? technique?
« Reply #12 on: February 02, 2014, 05:53:01 PM »
Downright normal - compared to some of the Wal-Martians I've seen !

Wal-Martians - I love it!  We got some doozies 'round these parts...  :o

ROVERMAN

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Re: ANYONE BUMP START ? Comments? technique?
« Reply #13 on: February 03, 2014, 02:47:24 PM »
I had to bump my 360 RT 1 Yam Enduro a few times, not much fun but doable with a decent grade and 3rd gear!
Roverman.