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project death weapon - 2 stroke cg

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CHR15
Turbo nutter bastard



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PostPosted: 19:18 - 17 Mar 2013    Post subject: Reply with quote

did think that, but there's a lot of things that could go wrong.


ive had an idea in the mean time. whilst im waiting for bits for the roller starter.


if i get an old front sprocket and weld a piece of 1/2 hex bar to it, i can spin the engine over via the front sprocket using this bad ass wrist breaking 110v drill we've got at work.
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Howling Terror
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PostPosted: 19:22 - 17 Mar 2013    Post subject: Reply with quote

Here Chris, you can loan mine.
https://i104.photobucket.com/albums/m174/howlingterror_2006/DSCF0406.jpg

We also demand you have the camera rolling when you fire her up.





THIS POST WAS MADE AS A SHAMEFUL ATTEMPT TO BE PART OF A LEGENDARY THREAD.
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Last edited by Howling Terror on 00:49 - 18 Mar 2013; edited 1 time in total
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Kickstart
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PostPosted: 19:24 - 17 Mar 2013    Post subject: Reply with quote

CHR15 wrote:
did think that, but there's a lot of things that could go wrong.


Years ago it was the only way a friend could get his 420cc KTM 2 stroke started. But not for the faint hearted.

CHR15 wrote:
if i get an old front sprocket and weld a piece of 1/2 hex bar to it, i can spin the engine over via the front sprocket using this bad ass wrist breaking 110v drill we've got at work.


One common way to do it is a pair of rollers (such as you are building), but wide enough that you can have the bike on there and one wheel of a car. Then start the car, put it in gear and let the clutch out. The diff puts all the drive to the wheel on the rollers (as long as you don't have a limited slip diff), and then you can bump start the bike on the rollers.

You could also (for a real bodge, and the risk of stripping the threads) wind out the spark plug a fair bit to lower compression.

All the best

Keith
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suzukirider19...
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PostPosted: 20:13 - 17 Mar 2013    Post subject: Reply with quote

this might sound daft but is the piston in the wrong way round?
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CHR15
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PostPosted: 21:57 - 17 Mar 2013    Post subject: Reply with quote

Yeah. It does go and when I actually got it going it revved and sounded fine.

The thing that's niggling me is that the spark isn't as good as I think it should be. It's blue, but its quite a thin spark, not a fat loud one.

My '68 bantam had a much stronger spark and that was running all the origional parts when I first got it going.

But all the resistances check out...
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Ste: I'm not entirely sure how you'd go about verbally abusing someone with a potato but I'm sure it's possible.
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suzukirider19...
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PostPosted: 22:05 - 17 Mar 2013    Post subject: Reply with quote

CHR15 wrote:
Yeah. It does go and when I actually got it going it revved and sounded fine.

The thing that's niggling me is that the spark isn't as good as I think it should be. It's blue, but its quite a thin spark, not a fat loud one.

My '68 bantam had a much stronger spark and that was running all the origional parts when I first got it going.

But all the resistances check out...


i would replace the plug as sometimes spark well outside engine but fail under comp, have you tried putting a bit of fuel down the bore and kick it over
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CHR15
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PostPosted: 22:15 - 17 Mar 2013    Post subject: Reply with quote

its had 3 new plugs.

started with the recommended platinum plug

swapped to an iridium plug

now using a bog standard br8es


tried fuel down the bore, tried preheating the plug, tried easy start, tried leaving it for ages to air out the crankcase, tried full throttle / no throttle / choke / no choke, tried taking it to tdc and giving it a swift kick with my body weight, tried thrashing it like im stamping on justin beibers head, tried bump starting.

only thing left is to just spin and spin and spin and see what happens.


also ordered a new pair of petals but there on back order from suzuki.
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Ste: I'm not entirely sure how you'd go about verbally abusing someone with a potato but I'm sure it's possible.
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suzukirider19...
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PostPosted: 23:42 - 17 Mar 2013    Post subject: Reply with quote

are you running with std air box? if not try cover the carb with your hand and kick it over. had the same problem on a old tzr as i wasn't using a air box
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CHR15
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PostPosted: 23:45 - 17 Mar 2013    Post subject: Reply with quote

cover the carb and it pisses fuel out the overflow and airjet hole.
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Ste: I'm not entirely sure how you'd go about verbally abusing someone with a potato but I'm sure it's possible.
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suzukirider19...
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PostPosted: 23:48 - 17 Mar 2013    Post subject: Reply with quote

CHR15 wrote:
cover the carb and it pisses fuel out the overflow and airjet hole.



mm strange. i would see what happens when you change the reeds
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kramdra
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PostPosted: 23:58 - 17 Mar 2013    Post subject: Reply with quote

disapoint. Laughing


several people push/ bump start? with video ofcourse.
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CHR15
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PostPosted: 09:30 - 18 Mar 2013    Post subject: Reply with quote

Quote:
several people push/ bump start? with video ofcourse.


tried that.

2 big guys pushing with me on it, in third.

you can just about push it fast enough to get it to spin over, but not with any force. and as soon as they stop pushing it stops pretty much dead.
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Ste: I'm not entirely sure how you'd go about verbally abusing someone with a potato but I'm sure it's possible.
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TotalGSXR
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PostPosted: 10:42 - 18 Mar 2013    Post subject: Reply with quote

I'll declare now that you're clearly more technically minded than I am. My mechanical knowledge involves reading a manual and doing as it says.

Your engine looks very similar to my RGV250M engine, and I had a problem similar to yours when my 'performance' reed valves were knackered. It was like the pressure was going the wrong way and blowing fuel everywhere.

I hasten to add I didn't install the 'upgraded' reed valves. I like OEM everything, and with that in mind, I don''t know how standard your engine is and how appropriate this pearl of wisdom is to you.
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CHR15
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PostPosted: 10:48 - 18 Mar 2013    Post subject: Reply with quote

did fitting oem reeds cure the problem?
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Ste: I'm not entirely sure how you'd go about verbally abusing someone with a potato but I'm sure it's possible.
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nightshaddow
Nearly there...



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PostPosted: 12:27 - 18 Mar 2013    Post subject: Reply with quote

sounds daft being an rm engine but have you tryed adding a power source to boost up the electrics

some bikes need a small amount of power just to get going
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TotalGSXR
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PostPosted: 12:32 - 18 Mar 2013    Post subject: Reply with quote

CHR15 wrote:
did fitting oem reeds cure the problem?


For me it did. They had a much better fit and it was much easier to kick over too. It's like the crank kept its momentum for longer.
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stevo as b4
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PostPosted: 19:28 - 18 Mar 2013    Post subject: Reply with quote

It's a omen pure and simple! The bike is the devil and it's trying to warn you not to mess with it, as if you do persist enough to unleash the fury within, it's going to seriously kill everyone who's ever seen it and rip out the heart from every corpse! Wink
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CHR15
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PostPosted: 20:12 - 18 Mar 2013    Post subject: Reply with quote

stevo as b4 wrote:
it's trying to warn you not to mess with it, as if you do persist enough to unleash the fury within, it's going to seriously kill everyone who's ever seen it and rip out the heart from every corpse! Wink


lol.

i'll make sure to put it on youtube then.


Quote:
sounds daft being an rm engine but have you tryed adding a power source to boost up the electrics


the stator is ac. you cant do anything with it.
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Ste: I'm not entirely sure how you'd go about verbally abusing someone with a potato but I'm sure it's possible.
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CHR15
Turbo nutter bastard



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PostPosted: 20:22 - 18 Mar 2013    Post subject: Reply with quote

anyway, today i tried the drill on the front sprocket idea.

it stalled the drill when it hit compression in 5th gear.

not sure if engine is trolling or just 93:1 cr.


i tried it without a spark plug and it turns over fine.

the threshold point for sparking is about 250 crank rpm, with a nice spark by 300.

which means in 3rd gear, my 2" starter rollers need to do 450 rpm to get the crank doing 300.


i also worked out the speed and ratios. at 8k rpm in 3rd the bike will be doing 60mph.

i think thats probably why its so hard to bump start.
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Ste: I'm not entirely sure how you'd go about verbally abusing someone with a potato but I'm sure it's possible.
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The999Kid
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PostPosted: 02:38 - 19 Mar 2013    Post subject: Reply with quote

CHR15 wrote:

i also worked out the speed and ratios. at 8k rpm in 3rd the bike will be doing 60mph.

i think thats probably why its so hard to bump start.


Shocked Shocked Shocked







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SQL
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PostPosted: 01:36 - 26 Mar 2013    Post subject: Reply with quote

Just read this start to finish.

Awesome.

Just Awesome.


Any updates~?
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CHR15
Turbo nutter bastard



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PostPosted: 09:25 - 26 Mar 2013    Post subject: Reply with quote

no.
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Ste: I'm not entirely sure how you'd go about verbally abusing someone with a potato but I'm sure it's possible.
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P.
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PostPosted: 09:38 - 26 Mar 2013    Post subject: Reply with quote

CHR15 wrote:
no.


Direct as fuck Laughing
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Alpha-9
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PostPosted: 10:41 - 26 Mar 2013    Post subject: Reply with quote

Have you tried re-configuring the quantum discombobulator so the flux capacitor lines up with the stasis drive stator?
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SQL
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PostPosted: 17:14 - 26 Mar 2013    Post subject: Reply with quote

CHR15 wrote:
no.


Don't beat around the bush Embarassed
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The last post was made 11 years, 25 days ago. Instead of replying here, would creating a new thread be more useful?
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