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Post by 80sting440 on Jul 12, 2016 8:48:49 GMT -5
Same here, have not got the sachs back from the machine shop yet, so the 70 stinger just sits there, i was going to work on clutching this weekend, by running my 75 and 72 out on the hay feild this weekend, and with the 6 inches of rain last night that may not happen since i would be water skipping out there. Hard to figure out clutching with that. Lol i may just have to cross my fingers that in close with that. 6 inches!!!WOW!!! We got the same kind of rain in Estavan Saskatchewan.
If only it could snow with that kind of intensity!
Rene
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Post by 75whip on Jul 12, 2016 12:05:09 GMT -5
If i remember right a 1" of rain is like 10" of snow? My wife said we got 7 1/4" man over 70" of snow. My driveway is 800' long god that would suck to plow. Now 70" over the winter, the old scorpions would be getting used alot😎
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Post by 80sting440 on Jul 12, 2016 13:37:21 GMT -5
If i remember right a 1" of rain is like 10" of snow? My wife said we got 7 1/4" man over 70" of snow. My driveway is 800' long god that would suck to plow. Now 70" over the winter, the old scorpions would be getting used alot😎 By the time you'd be done shoveling the driveway by hand, the snow would all be melted and you wouldn't even get a chance to enjoy it on your Scorps!
I went into the garage to get started on my engine and found my belly pan talking at me. It was getting jealous that I was setting it aside for my true love, Miss Engine! So I had to give it some lovin' too.
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Post by weverat on Jul 12, 2016 18:51:45 GMT -5
Oh ya, SPI,s their good pistons! Nothing better then bolting up a JLO.
I put the crank in the cases with out sealer. Assemble top end, then flip it over, remove the bottom case half, add the snot, and nut her up.
And of course the intake manifold needs to be on and snugged up before fastening the cylinders.
You guy's know what to do.
Also it is always fun to see how far the piston sticks out past the cylinder.
The edge of the piston should not protrude above the top of the cylinder more than .008 measured with a feeler gauge. If so add another gasket, or use a thicker one.
Basically your adjusting port timing and compression with the gasket. OBJ knows the magic number that works the best, mine just get bolted up with a .019 gasket. Seems to work ok.
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Post by 80sting440 on Jul 12, 2016 21:22:56 GMT -5
Oh ya, SPI,s their good pistons! Nothing better then bolting up a JLO. I put the crank in the cases with out sealer. Assemble top end, then flip it over, remove the bottom case half, add the snot, and nut her up. And of course the intake manifold needs to be on and snugged up before fastening the cylinders. You guy's know what to do. Also it is always fun to see how far the piston sticks out past the cylinder. The edge of the piston should not protrude above the top of the cylinder more than .008 measured with a feeler gauge. If so add another gasket, or use a thicker one. Basically your adjusting port timing and compression with the gasket. OBJ knows the magic number that works the best, mine just get bolted up with a .019 gasket. Seems to work ok. Weve...I follow what you're saying... I'll do it your way 'cus my Moto 1 sealer firms up too quickly for me to get it done the conventional way. The package instructions says to let it set up for 1 minute...with your way, I stand a chance!
My base gaskets measure between .019 and .020. I'll watch for that.008 piston overlap.
As always, I appreciate your advice and help. Thanks, Rene
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Post by weverat on Jul 12, 2016 22:01:25 GMT -5
Rene - Some aftermarket pistons are a tad narrow for the wrist pin bearing and the spacers. Some times you have to reach in there with a file or die grinder and take off .010 or so in order to get the pistons onto the rods.
Hopefully your SPI's will fit, if not just give them a little tweak. I can not remember, maybe it was the Parts Unlimited pistons that were narrow, but my buddie Charlie had the same experience.
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Post by 80sting440 on Jul 13, 2016 7:26:10 GMT -5
Rene - Some aftermarket pistons are a tad narrow for the wrist pin bearing and the spacers. Some times you have to reach in there with a file or die grinder and take off .010 or so in order to get the pistons onto the rods. Hopefully your SPI's will fit, if not just give them a little tweak. I can not remember, maybe it was the Parts Unlimited pistons that were narrow, but my buddie Charlie had the same experience. These SPI's actually have more room for the bearing and spacers than stock. They are 20 grams lighter. The top ring land is also a bit higher up on the piston...more h.p....woohoo!!!
Rene
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Post by 80sting440 on Jul 13, 2016 8:14:09 GMT -5
I stuck a rod pin in between them to get a true representation of how they compare when installed.
Rene
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Post by obj1 on Jul 13, 2016 8:49:24 GMT -5
If could offer one thing here it would be to make sure after bore job all the ports are chamfered carefully. I have a real bad story about this. Weve, see me at a race and I'll tell you how I learned this.
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Post by 80sting440 on Jul 13, 2016 9:19:40 GMT -5
If could offer one thing here it would be to make sure after bore job all the ports are chamfered carefully. I have a real bad story about this. Weve, see me at a race and I'll tell you how I learned this. obj1, thanks for the tip. If you magnify the posted pic, you'll see that they have been chamfered. So now I'll go and double check each individual port to make sure.
Once again, I appreciate your help! Rene
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Post by admin on Jul 13, 2016 18:43:45 GMT -5
Is that a small crack at the bottom of the photo inside the bore (near your thumb)?
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Post by 80sting440 on Jul 14, 2016 5:04:02 GMT -5
Is that a small crack at the bottom of the photo inside the bore (near your thumb)?
Good eye admin. At first, I thought that it was a hair. After I put on my peepers, I came to realize it's simply a flaw in the casting. It's not deep and should be fine. I was wondering who would catch it!
Thanks for pointing out a possible issue...you must of had your peepers on!
Rene
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Post by obj1 on Jul 14, 2016 14:41:16 GMT -5
Those ports are just big enough to run Yamaha exciters, merc trailtwisters and most others right through there! We've ran a few through ours and never even felt it!!
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Post by 80sting440 on Jul 14, 2016 22:53:47 GMT -5
Those ports are just big enough to run Yamaha exciters, merc trailtwisters and most others right through there! We've ran a few through ours and never even felt it!! That's why I run 'em with Uni filters...to keep junk like that out!
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Post by 80sting440 on Jul 19, 2016 18:31:47 GMT -5
Seeing that I couldn't locally source needed bolts for the fan housing, I made my own. I purchased some socket head cap screws, class 12.9, M8-1.25 x 20. I shortened them to 15mm, ground a taper on the back side, ground down the head face with a chamfer finish to clear the flywheel. These work out better than stock, as they have a bigger (6mm) hex socket for easier future removal.
She should be good 'till she wears out or blows up, whichever comes first!
Rene
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Post by 80sting440 on Jul 22, 2016 21:20:05 GMT -5
I got it started on the first pull! After a rebuild, it's always fun to see how many kicks (motorcycle) or pulls it takes to start an engine. I made sure to first fill the fuel lines, pump and carb. Primed it twice, pulled it over twice with the kill switch off and as we say in French, VOILA!
I have disconnected the "choke" as I prefer just using the primer.
The aftermarket cdi box did not accept the kill switch, so I bypassed the throttle safety switch by soldering the centre rivet to the left pin and got it to work.
If you look closely you'll see the belt and pulley moving (well, sort of).
Let's hope that she runs as good on the snow!
Rene
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Post by 80sting440 on Jul 25, 2016 20:20:48 GMT -5
Well, I've been moving forward on the Sting. Three short heat cycles (4 minutes each) for the engine...I can now re-torque the heads and case/cylinders.
I've ground off the muffler heat shield as it'll look better when wrapped.
I've disassembled the rear skid and fought a good fight with the rear pivot aluminium shaft. It had never been greased and was rusted solid. It should ride a little better now! The shock is shot, so I'm playing around with a left over shock that I had from my previous Statos project. It's a new SPI nitrogen high pressure shock. The Paraslide III unit is coupled front to back in a unique way. I have a hard time leaving anything stock, so I'll see what kind of trouble I can get into with it...
Rene
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Post by 80sting440 on Aug 4, 2016 18:05:28 GMT -5
Waiting for my sliders to come in... 2 days for delivery in the US...2 weeks to come through US/Canada border
Rene
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Post by weverat on Aug 4, 2016 20:54:02 GMT -5
So did that shock just fit, or did you modify the mounts?
I am a bit lost here, as I also played with the shock on a para slide, and determined the stock original is specific to the Scorpion only. I was unable to find a suitable replacement.
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Post by 80sting440 on Aug 4, 2016 22:50:51 GMT -5
Well, first of all I copied your spring colour...that was a no brainer, so I qualified for that mod.
Stock shock...9" closed...13.5" open. Gas shock...10.25" closed..14.5 open.
I had this shock lying around...it's an SPI # ...? can't find a number.
The front mount is left stock and I shimmed the sides to fit.
The rear mount got widened so the shock body can swing by, and is shimmed to fit.
I upgraded to grade 8 bolts because of the wider span.
I did an experimental run with shock only, without spring, and it seemed all good.
With the old shock, the spring sat 3" ahead of the lower mounting bolt at the softest spring setting. The new setup has the spring sitting at only 2" ahead of mounting bolt for a softer spring pressure as the nitrogen shock creates it's own "spring" pressure that is not there with a simple hydraulic shock.
When measured at the rear bumper stop, I've gained some theoretical travel!
weve...let me test this setup on snow and make any needed adjustments-mods. We can discuss it on the phone if need be...or go at it yourself and we can compare notes! If you have any more questions...ask away!
I don't know how it'll work out, but I'll tell ya, my rear shock/spring setup on my Stratos works fantastic.
Rene
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