|
Post by stevec5000 on Jun 7, 2008 9:00:38 GMT -5
I guess the 400 is easier to start but we don't have those here and I've never seen one. The 500 can be a bear sometimes though.
|
|
|
Post by davedunsboro on Jun 7, 2008 9:22:57 GMT -5
I suppose it should be 20% easier at least ! The 500s will kick no problem with a flat battery as they have a self exciting permanent magnet system that gives a good spark . But I'm not sure if the 400 is different (I didn't think so). While we're on the subject ,can you buy after market bits for the kickstart mech or is it gen yammy ? I'm sure I'll need one at some stage cheers Dave.
|
|
|
Post by malakiblunt on Jun 8, 2008 13:33:40 GMT -5
yes as i understand it the onoly differnce with the 400 is a shorter stroke, and a heaveyer exhaust .
though i would imagine the shorter stroke would make it eaiser to kick, as iehter the kicker will be lower geared or you dont have to push it as far,
|
|
|
Post by caferacercarl on Jun 9, 2008 0:12:42 GMT -5
Chew 652 described very well the way we used to start Andy's 587cc road racer, [no kickstarter] normally a 500 in good condition locks the back wheel and skids trying to clutch start them just like a multi, write down chew's advice, its sure fire and the way speedway singles do it as well. cheers.
|
|
|
Post by colinjay on Jun 9, 2008 17:53:25 GMT -5
The only time I ever had trouble push starting my cafe racer (with a hot engine cranking about 12:1 comp) when it didn't have a kickstarter fitted was late one night after comming out of a pub I used to frequent. After pushing the bike up and down the street for about 15 minutes and just about throwing up from the combined effects of the effort and booze, I checked and found that my smart-arsed mates had pulled off my plug cap. They were watching and found it all quite amusing. After fitting the plug cap the bike started with out any dificulty.
As stated previously, by holding in the decomp (with your thumb) when you drop the clutch, the releasing the decomp, the SR (and XT/TT's) will bump start quite easily, even on a flat road with an unfit lump like me pushing.
With regards to wheeling the bike back onto compression before pushing, this is the way speedway solos have always been started. I can remember may time watching riders and other mechanics start speedway bike on their pit stands by turning the rear wheel to get the engine onto compression, then just giving the rear wheel a good pull with there hand and starting the engine. Remember we are talking about a hi comp racing engine running on methanol here, I tried too do it on numerous occasions but could never get the technic correct.
CJ
|
|
|
Post by stevec5000 on Jun 9, 2008 19:00:28 GMT -5
> then just giving the rear wheel a good pull with there hand and >starting the engine.
You must still be drinking! Nobody is going to spin the rear wheel on my bike and get it started.
|
|
|
Post by colinjay on Jun 9, 2008 21:06:33 GMT -5
The only alcohol involved was what was put into the bikes fuel tanks. Although a fair bit was generally consumer after the racing was over.
The boys racing speedway back then used 2-valve Jawa engines, with a magneto that would just about kick you 1/2 way across the pits if you just spun the magneto with your finger. I don't think I ever seen one hand started from cold, but once the engines were warm, a good "pull" on the rear wheel and the would start almost instantly. Proof that a good ingition system is 1/2 the battle with a hi tune engine. Also the gear of a speedway bike (no gearbox, just a reduction box) would probable equate to about 3rd gear on a SR, so you got a descent bit of "leverage" on the crank.
CJ
|
|
|
Post by StewRoss on Jun 10, 2008 2:56:44 GMT -5
I used to pit for a speedway rider on 2 valve Jawas years ago...as you say hot or cold, back onto compression, then wearing an MX glove on your starting hand, pull her through and she started first go most times. Then you just stand there quietly revving her on the stand...ah the old days. I do that on the 350 Honda racer I have here as well...back onto comp, flood both Kei Hins, then push away... SR
|
|
|
Post by singlespinner on Jun 24, 2008 22:23:34 GMT -5
As anybody who has raced will tell you put it in 2nd gear and roll it back against compression to give the engine a run up to the next compression stroke
Singlespinner
|
|
|
Post by wotavidone on Jun 24, 2008 22:47:16 GMT -5
CJ's efforts at starting the bike by spinning the backwheel by hand reminded me of the night I did something a bit similar - kickstarted my old ute. I was out on my block of land (long since sold, sob!!) working on a shed I was erecting, by the light of the ute's head lights. By the time I realised the lights were getting dim, there was no way in the world the old girl was gunna start. No mobile phone, and a 5 mile walk back into town. Hmmm! So in desperation, I jacked one back wheel off the ground, the rightside one if I remember correctly. I turned the ignition on, put the ute in 1st gear, the wheel spanner on a wheel nut, pointing at about the two o'clock position, and stood on the spanner. Everything turned over but the ute didn't start. So, I whacked the spanner on another nut did the whole thing again. Nothing. On the third try, the spanner took off into the darkness. After a confused moment I realised that the spanner had been thrown off by the now spinning wheel, coz the ute was sitting there idling away on the jack. I gave here a few revs in neutral, then went round the front and gave her a big shove to push her off the jack. Then drove home. Found the spanner next day. Later I thought of all that could have gone wrong. like it was pointing at my new shed and could easily have started and fallen off the jack and run into the shed. And how lucky it was that the spanner flew off harmlessly into the scrub, etc. But, it just goes to show, lots can be done, especially if the other choice is walking home in the dark. Mick
|
|
|
Post by milkman on Jun 25, 2008 1:06:53 GMT -5
I agree Mick, walking can sure motivate you.
Try an ancient tractor that grain farmer insists on using because they A) dont rust out or b) make them like that anymore
This thing had a kerosene starter, then you switched to diesel once it was going - all done by ye old crank handle
Trying to put my weight behind that, while keeping my head out of the way in case the handle flew off, and being ready to let go if she fired to avoid ripping my arm out, was honestly something i never want to do again - ever
|
|
|
Post by wotavidone on Jun 25, 2008 7:26:09 GMT -5
Heh,heh,hee. The ol' crankstart tractor trick, eh. When I was a boy, everyone knew someone who'd cracked a wrist or broken an arm starting some old piece of junk tractor with a crankhandle. And that was the petrol ones. Most deisels were 17:1 compression or even more weren't they? Had me a little 25hp Kubota deisel. Even with a new battery she needed the decompression lever to get her spinning over to start with. Musta been lotsa fun with a crankhandle. Remember the old tractors that had the cartridge a bit like a shotgun shell? Used to fire that to start'em? Theres a thought, maybe one of our brilliant engineers in the group can come up with a screw in fitting to start these SR's with a cartridge. Mick Mick
|
|
smoris
Junior Member
Posts: 31
|
Post by smoris on Jul 3, 2008 3:30:14 GMT -5
You can definitely start an sr 400 on your own on a flat surface... I know cause I did it at work yesterday because I left the ignition on all day and had a flat battery and couldn't kick start it. I guess the 500 is harder. Seems to have more puff than the 400??? mmm...that doesn't matter, you don't need a battery to kickstart your engine. I start my 500 without battery in one kick I would say you should keep practicing kickstarting the bike, I just lurned not to use the kick indicator. I do it like this: push the kick lever until you feel the compression, then use the decompression lever to push it over its compression point, then let go the compression lever and kick as hard as you can. this works fine with my bike
|
|
|
Post by pvlietstra on Jul 4, 2008 8:12:10 GMT -5
I always bump start when leaving home.
Before moving, fuel tap to prime, ignition on, kill switch off, choke on. Then decompress, turn engine over a few times.
After moving, put into 2nd gear, drop clutch and sit down hard to maintain traction.
It i leave out any of the steps, I have to push the bike back up the hill, or kick start at the bottom of the hill. Otherwise, it starts first time (and has been doing so for the past twenty years).
|
|
|
Post by singlespinner on Jul 5, 2008 3:15:59 GMT -5
watched a mate start his 53 BSA M20 , that's a 500cc side valve for you non wrinkleys I was amazed when I saw his method manually retard..pull in valve lifter..kick..engine starts..let out valve lifter..YES that's right the engine starts with the exhaust valve open, maybe if we adjust the cable until valve is just off the seat would it work on an SR
Singlespinner
|
|