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Post by lshigham on Dec 29, 2010 8:15:42 GMT -5
Changing the main shouldn't effect the idle circuit.
I reckon something came loose/fell out of the float system when you changed the main, it's happened to me before.
Remove the plug to let the excess petrol evaporate from the top end whilst you do that.
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Post by gr70sp on Dec 29, 2010 8:47:14 GMT -5
am i able to remove the coolant pipe prior to removing the plug, the coolant pipe is on top of the plug and if i remove it, should i expect coolant to leak?
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Post by lshigham on Dec 29, 2010 8:54:17 GMT -5
am i able to remove the coolant pipe prior to removing the plug, the coolant pipe is on top of the plug and if i remove it, should i expect coolant to leak? Aye, it'll drain almost all of it. It is possible to reach round it, or bend it out of the way.
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Post by gr70sp on Dec 29, 2010 14:28:50 GMT -5
ended up being a wet fouled spark plug, put a br9six in and it started first time!
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Post by lshigham on Dec 30, 2010 13:45:21 GMT -5
How are you getting on with the up-jet? Still bogging? You might want to try an iridium plug, they are less prone to fouling. -------------------------------------------------------------------------------------- Got some goodies in today: -Handful of pilot and idle jets (question for you, Brent: What pilot jet do you use? I'm having problems getting the correct size) -Athena Kevlar belt -Gasket set -Malossi covered filter I also stabbed myself in the hand trying to remove the chipped carbon from a muffler can, the tendons looked gruesome
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Post by gr70sp on Dec 30, 2010 19:52:00 GMT -5
hey mate, jetted to 115.
i put a new iridium plug in yesterday br9ix i think?, started first time after that, all is well now!
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Post by lshigham on Dec 31, 2010 7:04:21 GMT -5
Strange, could have been the cold weather or a stray piece of carbon.
Got some work done this morning, changed out the head gaskets, re-jetted the carb, fitted the covered filter and increased the squish to 0.8mm. A rather productive day, I think.
Next is the drive belt and rollers.
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Post by lshigham on Jan 1, 2011 18:26:52 GMT -5
Double checked my squish and found it was nearly 2mm. Kinda screwed up there, although that does explain the extreme loss of low end power. It does still go scarily fast on the pipe though, I got up to 68 at 11000 and climbing before it occurred to me that it would kinda hurt if a tyre blew out. I'm going for a 120mi round trip, involving mostly dual carriageways on Weds, so I'll get a chance to have a go at a top speed test then.
I've managed to find a local station that sells 99 octane fuel, so this could get interesting. Filled her up, so am off to lower the squish now.
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Post by lshigham on Jan 2, 2011 12:31:06 GMT -5
Unbelievable, it's still pre-igniting with 0.8mm squish and 99 octance fuel. That's some compression!
When I pulled into my driveway (after going shopping for goodies, I'll post a pic of them later) I shut the ignition off, but it carried running on for at least 5 seconds afterwards.
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Post by lshigham on Jan 5, 2011 10:44:23 GMT -5
I've been shopping again:
19x15.5mm Rollers - 4.5g £6.13 x 1 £6.13 Dellorto Jets Box - 5mm - 75 - 98 £12.20 x 1 £12.20 19x15.5mm Rollers - 4.0g £6.13 x 1 £6.13 Mixing Bottle Stage 6 £2.40 x 1 £2.40 Dellorto Needle Clip £1.48 x 1 £1.48 Stage6 Exhaust Gasket £1.99 x 1 £1.99
And booked a dyno run on Saturday. Promise I'll get a printout :-)
I'm still having problems painting the exhaust, even if I clean it back to bare metal and wash it well the paint on the half nearest the cylinder still burns off. I've tried three different brands, all 500c rated. Anybody have any tips? I really don't want to let it go rusty, the metal is very thin.
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Post by lshigham on Jan 5, 2011 17:36:01 GMT -5
For the sake of it, and so that I can use to remind myself at a later date, here's a full list of modifications:
-70cc (47.6mm) Doppler S7R (AKA Stage6 Racing / Athena HPR) ---0.8mm squish ---Exhaust: 194.96, transfer: 133.29 -Yasuni City 16 -21mm PHBG carb -PM Tuning reed block with 0.2mm CF reeds -Malossi covered E5 filter -Polini Hi-Speed variator -Polini slider and Malossi torque control (one on each end of the spring) -21kg Polini contrast spring -Blue (strongest) Polini clutch springs -Athena drive belt -4.25g rollers -Removal of oil injection, 33:1 premix
Carburetion:
-90 main -50 pilot -W12 needle, clip second from the top -50 slide
Fuel wise, I get about 65mpg with Shell V-Power and a measly 50 with normal 95 octane.
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Post by lshigham on Jan 6, 2011 11:35:02 GMT -5
I'm particularly pleased with the S6 mixing bottle, only £2.40 as well.
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Post by 90GTVert on Jan 6, 2011 12:29:37 GMT -5
Nice mod list with great detail.
Yer rollers are supercharged! ;D lol
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Post by lshigham on Jan 6, 2011 12:51:52 GMT -5
That's a BGM product line, there is also an original line for OEM style and a pro for improved original style stuff. A bit of a strange name for a scoot company to use. Do you get BGM stuff over the pond?
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Post by 90GTVert on Jan 6, 2011 16:35:15 GMT -5
Can't say I've seen it before. That's not to say no one carries it. Other than a few spots, most sellers in the US are gonna be carrying NCY, Hoca, MRP, and various no-name stuff.
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Post by lshigham on Jan 6, 2011 16:59:53 GMT -5
Can't say I've seen it before. That's not to say no one carries it. Other than a few spots, most sellers in the US are gonna be carrying NCY, Hoca, MRP, and various no-name stuff. None of that stuff is readily available over here. The big names over here are Malossi, Polini, Stage6, PM Tuning, BGM, Athena, TNT, HEBO and some other smaller brands. That does explain why I have a seemingly endless supply of parts to try and you seem to be stuck modding what you can get hold of. It's a shame, as most of the above names do make parts for Minarelli's.
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Post by lshigham on Jan 6, 2011 17:01:29 GMT -5
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Post by 90GTVert on Jan 6, 2011 17:18:50 GMT -5
We do have some nice stuff here, it's just not plentiful. I don't think there are enough serious tuners in the US to make it worthwhile for most US businesses to stock up on the big brands. When I want something good I usually just place an order with SIP Scootershop. They have good prices and offer reasonable shipping. I tried ordering from Scooter Attack a couple of times. The first time I was satisfied. The second time it took a long time to get the parts and shipping was ridiculous. I tried to order a few Polini BBKs from US sellers, and no one had them in stock in the US. You'd think I was crazy for wanting 3 Polini Sport kits. lol I just wanted to have 2 10mm and 1 12mm around for potential customers when I was working on scoots. I ended up going back to SIP for that order. SIP beat my "discounted" prices and had the parts in stock.
One thing I can't seem to find much of anywhere are name brand 90-100cc minarelli cylinders. Everything here and from online sellers from Taiwan and China is basically the same.
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Post by lshigham on Jan 7, 2011 17:56:46 GMT -5
We do have some nice stuff here, it's just not plentiful. I don't think there are enough serious tuners in the US to make it worthwhile for most US businesses to stock up on the big brands. When I want something good I usually just place an order with SIP Scootershop. They have good prices and offer reasonable shipping. I tried ordering from Scooter Attack a couple of times. The first time I was satisfied. The second time it took a long time to get the parts and shipping was ridiculous. I tried to order a few Polini BBKs from US sellers, and no one had them in stock in the US. You'd think I was crazy for wanting 3 Polini Sport kits. lol I just wanted to have 2 10mm and 1 12mm around for potential customers when I was working on scoots. I ended up going back to SIP for that order. SIP beat my "discounted" prices and had the parts in stock. One thing I can't seem to find much of anywhere are name brand 90-100cc minarelli cylinders. Everything here and from online sellers from Taiwan and China is basically the same. I can't recall ever finding a 90+cc Minarelli cylinder, and I look at a lot of scoot parts. There are some 96cc Piaggio one's available from Malossi (33 bhp - yes please!).
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Post by 90GTVert on Jan 7, 2011 22:07:59 GMT -5
Yeah, it's disappointing. The most common big kit I've seen used on the minas is the 2fast LC kit. I don't even think it's a huge bore like the 50-54mm 90-100cc stuff, it's just intended for a 44mm crank IIRC. I paid little attention to it after seeing the $1,000 price tag for just the cylinder kit. Add a crank that supports that kind of revs and other supporting hardware and you are into some really serious money. I love scoots and modding, but when my engine costs a few thousand dollars, I think I'll just put a down payment on a sportbike.
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Post by lshigham on Jan 8, 2011 17:32:31 GMT -5
Made my trip to get it dyno'd today. 220 miles Now, the good news. It's got 12.5hp and is capable of speeds in excess of 75mph. We don't know if it'll do more, it wasn't fully pushed to the limit and was jetted very rich. The Dopper cylinder kit, although made by Athena, is pretty crap quality. The porting on mine is off, so it won't do much over 11,000. Now for the good news, I've brought back a Stage6 Race, which will happily go over 12K. I'm going to fit it tomorrow, and take it back down for another dyno run, apparently a scoot with the same setup had 14.5bhp and would top 80. Yes please! I also picked up a Stage6 torque control clutch for £60, so I should be able to get the clutch to engage just as the powerband starts. Wheelies!!!
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Post by lshigham on Jan 9, 2011 9:24:44 GMT -5
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Post by lshigham on Jan 9, 2011 18:07:54 GMT -5
The main differences between the S6 and Doppler are the cylinder plating, porting and squish band size. The S6 is plated differently (the plating extends to the top of the cylinder), has nicely chamfered ports and a larger squish band. I've set the squish at 0.6mm, as recommended in the instructions (which, incidentally, are in German, proving rather problematic).
The S6 cylinder is now all installed, a quick compression test shows over 200 psi, way up from the Doppler. This aught to get interesting!
I'm going to make some jetting and clutch adjustments based on what the Dyno graphs show me (a rather useful A/F vs RPM chart was also printed for me).
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Post by lshigham on Jan 10, 2011 5:50:57 GMT -5
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Post by 90GTVert on Jan 10, 2011 23:34:24 GMT -5
Good info. Unless the dyno is loaded progressively with speed (really have no idea how a scoot dyno works) the MPH will be off of real world numbers. There's not aerodynamic drag on a dyno. Cool just to see a scoot dyno chart to me. AFR is an added bonus.
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Post by edfr on Jan 10, 2011 23:51:31 GMT -5
Ishigham, Now that is a BAD ASS ride, I bet you have to hold on if you crank the throttle otherwise it will blow you butt off the scoot Man oh man a #50 pilot jet just to Idle DOES IT LOPE at idle ;D I would put NO SLUG on the license plate . With all that power you could put in taller gears in your tranny, go up 2 teeth on the short shaft and go down 2 teeth on the big gear, that would be good for approx another 10mph top end. Lefty
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Post by lshigham on Jan 11, 2011 2:42:52 GMT -5
Good info. Unless the dyno is loaded progressively with speed (really have no idea how a scoot dyno works) the MPH will be off of real world numbers. There's not aerodynamic drag on a dyno. Cool just to see a scoot dyno chart to me. AFR is an added bonus. The AFR has got to be the best bit, yes. The Dyno is progressively loaded with speed to give it a real world A/F ratio, otherwise it would appear to lean out. Notice how the revs drop after about 50? that's becuase I have it so rich.
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Post by lshigham on Jan 11, 2011 2:45:40 GMT -5
Ishigham, Now that is a BAD ASS ride, I bet you have to hold on if you crank the throttle otherwise it will blow you butt off the scoot Man oh man a #50 pilot jet just to Idle DOES IT LOPE at idle ;D I would put NO SLUG on the license plate . With all that power you could put in taller gears in your tranny, go up 2 teeth on the short shaft and go down 2 teeth on the big gear, that would be good for approx another 10mph top end. Lefty Funnily enough, I did consider upping the primary gears, I've already done the secondary by 22% overall. The 50 pilot is way rich, it's just what came with the PHBG carb. I'll probably drop it down to 35-40 eventually. Thanks for the compliment
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Post by lshigham on Jan 17, 2011 4:12:39 GMT -5
I paid a visit to Shiny today ( www.shiny-red.net/) who worked his magic. It was running way lean at 15:1 at 60mph, so I'm glad I did! Had it up to an indicated 74mph whilst overtaking someone on the way back, and he's not done yet. Next on the agenda is a 28mm flat slide carb, HPC crank and case flowing ;D
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Post by aeroxbud on Jan 17, 2011 5:11:24 GMT -5
is the man for runners
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