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Post by 2strokd on Feb 12, 2015 9:54:43 GMT -5
Lol, frame braces make good cable routes Dont know how i know
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Post by niz76 on Feb 13, 2015 1:19:47 GMT -5
Got some goodies from Parts For Scooters today! Some new cylinder studs to fix the one that was stripped. - Luckily it was the stud itself that stripped and not the case! A longer throttle cable so I can mount my rear facing intake. - They were out of 70" so I got the 60". Hope it's long enough! A cheapy filter with 44mm inlet to fit the Mikuni 24mm carb. A set of mirrors to replace mine- I put my scoot on the side stand for just a second in my driveway while I shuffled scoots and it rolled forward a bit and fell over breaking one mirror. Dangit! They're identical to the ones that were already on my scoot. Hate to buy parts just to end up having exactly what u had before a stupid mistake haha. I'm giving my engine a few upgrades- mainly because it's been largely untouched since I first installed this 90cc, and also because my scoot seems to have slowly lost some power over time. I found a leak in the cylinder head due to a stripped stud so I'm sure that didn't help at all. I have also been battling overheating for a little while running really high compression with this stock 49cc carb and exhaust. I finally got a decent carb and fabbed up a intake that's not too restrictive and also frankensteined my exhaust to give everything better flow in and out of this engine. A lot of the stuff I've done on my scoot has been some "homebrew" stuff that I've made up like the modded Hoca vari, intake, exhaust etc. I hope to get everything working decently to get my scoot on "the list". I plan to go from this stock Eton 50mm ATV cylinder to a 54mm Hoca cylinder. It may be a few weeks before that happens so I'm trying to dial in what I have now pretty decently. I suppose my life would be easier if I were a "credit card tuner" as 190mech put it lol but in a way I see it as kind of a badge of honor to piece together a good running scoot with what's available. Speaking of piecing things together, I'm not sure I've showed any pics of my exhaust completed. It actually sounds pretty decent but it's got a leak right where I welded the flange on my hand-built header My compression is still pretty high at 185... Brent may have found me a belt that I can try to use with the Piaggio rear pulley to try to put together a "poor man's OverRange" since this Adly uses a really long belt already. I haven't dug into it yet, but I'm hoping to mount the Polini clutch and bell onto the Piggy pulley so keep a lookout for some more "redneck tuning"! lol.
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Post by jhobe6678 on Feb 13, 2015 6:45:30 GMT -5
I was thinking of buying those mirrors for the M1, to replace the broke one from the accident. I didn't like the stock ones anyways.
Have fun with the new toys!
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Post by niz76 on Feb 16, 2015 15:12:48 GMT -5
Well I've been through hell and back mounting this 24mm Mikuni on a rear facing intake but it's finally done! I still have yet to ride my scoot since I made this exhaust but what I've been wanting all along- more air and fuel in and out- is finally coming together. I can tell you that me and welding just do not get along haha. I had to modify my throttle cable also since the stock one wasn't long enough and the new one I ordered wasn't long enough either! I ended up splicing the short section that splits off the stock cable onto the new throttle cable and it all turned out nicely. There's a few steps that I didn't get pics of but it's been an epic battle! Here's how my scoot sits now: I originally installed the rear facing aluminum intake that I modified from a Vento Zip and all seemed well... However, when I went to install the engine back into my scoot I noticed there wasn't much clearance under the hump in my sub frame. Well, after I put all my weight on the back of the scoot to mimic the travel it would need while riding the intake hit the hump and broke my epoxied creation in half! I didn't get pics of that... So now I set out to weld together an intake like 190mech suggested... I have a bunch of bits of steel here and there but nothing that would do for the base of the intake so I headed out in search of some steel. There's a few steel places somewhere by me but I ended up at Home Depot and bought a couple pieces of flat stock and a gate hinge! The flatstock wasn't wide enough (I later found the perfect stuff at TSC). Here's what I chose to start the intake creation: A little grinding and drilling... A little more cutting and grinding... Now there's about a two-day gap where I welded on the curved tube from my old Adly exhaust and got the angle just wrong coming off the engine and under the sub-frame... I welded and grinded and cut and re-welded and adjusted and omg what a battle! I finally got everything just right going over the engine mount tube and under the sub frame hump. What a pita! After working and re-working this creation I did my best to make everything level: It's not perfect as you can see but I called it done. I filed so much my abdomen hurt! lol. I also had to do some engine case cutting... I'm totally commited to kick-start-only now! There was more time in between where I had to modify my throttle cable and wow of all the scoots I've stripped the body panels off- this darned AIR 50 is unbelievably difficult to get the body panels off... I was a little worried that I wouldn't have good throttle response with this longer intake but I trusted 190mech pic of his that seemed even longer and I must say that I'm surprised that throttle response seems nice and crisp. I've also read that these flat slide carbs have really good throttle response. I can tell that I'll need a larger idle jet as I have the air screw turned in all the way rich just to get good idle and rev. I think my buddy included a larger one but I haven't got that far yet. I got the other main jets I need for this carb in the mail too... This Mikuni TM carb takes the VM4/042 main jets and I found them nichecyclesupply.com on ebay for $3.65 ea. Here's a video I took right early this morning when I woke up. I probably should've waited until I at least had my coffee haha. U can see that I dropped my phone in the vid The exhaust is a bit loud but not too bad. I did put a baffle toward the end and some screen and packing in there too. I'll need to cut the bottom of my seat bucket out a bit to fit the seat back on... I purposely didn't include any pics of my welding- it's that bad!! hehe. The intake diameter is 26mm... The vid is still processing so I'll add it later.
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Post by niz76 on Feb 16, 2015 15:33:22 GMT -5
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Post by niz76 on Feb 16, 2015 17:55:58 GMT -5
Just as I suspected my welds are not airtight and there's not even enough vacuum to keep the petcock open and it keeps running out of gas like in the vid. I can see oil building up in spots on the intake where I welded it.. I suck at welding lol. I'll have to suck up my pride and just coat the intake in JBweld...
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Post by Fox on Feb 16, 2015 21:49:11 GMT -5
Nothing wrong with JB Weld. I heard rumor that it's better than duct tape or bailing wire.
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Post by niz76 on Feb 17, 2015 2:37:28 GMT -5
Oh heck ya baby! I just took her out for a test ride and this baby is flying! I'm still really fat on the MJ- running a 140 and it's too large but if I held the throttle right in the sweet spot at about half throttle she's finally doing 8k+ RPM's ( I have never gotten this 90cc over 7200 RPM's) and I nearly buried my speedo! My scoot speedo goes to 75mph. (not kph!). Ooh baby I'm excited! gonna drop down to a 125 MJ and try another run! I did turn my GPS speedo app on toward the end and got 54mph. It's got a lot left in it! My previous best is 58mph on this big beast when I first built the 90cc and my belt was nice and fresh. I covered the intake in steel epoxy and painted it with about five coats of white appliance epoxy so I would see a leak if it sprung one. So far so good. I also gutted the vacuum petcock and installed an on/off valve as it seemed no matter what I did I can't seem to get any vacuum from the ports on this carb. Maybe it doesn't supply vacuum? I considered taking one of the vacuum nipples off the Hoca intake I have and drilling and tapping into my intake but with all the leaking issues I've been having I said "forget that!" Here's the intake: I have to chuckle at this pic because of what it looks like haha. The inline shutoff valve: FINALLY COMPLETE!! Rear facing intake and carb from above: My redneck exhaust haha. It's loud but I'm proud of how it's performing! I kinda copied the "Phongeer design". It feels good to be riding my big beast again as it's down for quite a while. I've been riding mostly flip scoots lately and the 2001 Prebug for the last few days. It was fun doing wheelies from each stoplight but it never got above 43mph and I finally got it running perfect and returned it back to it's owner. Back to more tuning. Gotta get this beast ready for "The List"!
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Post by niz76 on Feb 17, 2015 4:04:34 GMT -5
I went out for a test ride and had so much fun I just kept on going. Carb still isn't 100% tuned. I'm going to need some smaller jets. The smallest jet I have for this carb is a 110 and it's still too big. The sweet spot is now at about 3/4 throttle but any more than that it just kinda sputters and bogs and the weird thing is the temp gauge shoots up at WOT. It seems to hang out at around 380 at the sweet spot and I got 58 mph. GPS. Still running pretty hot... I can't believe this speedo is 20 mph off! Way to go China! Holy bad gas mileage batman. I went 22 miles and burned 3/4 of a tank of gas!
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Post by 190mech on Feb 17, 2015 5:27:33 GMT -5
All the extra tube fittings are float bowl vents/overflow,they should be open with lines attached to them directed away from the rear tire in case the float sticks,the tire wont get slick... Sounds like you are getting close,just need to get a better breathing cylinder now!
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Post by niz76 on Feb 17, 2015 8:24:57 GMT -5
Thanks John! I Figured out the one side vent as when I tip the carb sideways fuel would run out of it.. Cylinder is next on my list when I get this baby dialed in.
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Post by niz76 on Feb 20, 2015 20:59:34 GMT -5
Sweet my jets came in the mail already! Nichecyclesupply ships super fast I wasn't expecting these for a few more days but I see their address is in St. Petersburg, FL. Less than an hours drive from me. The smaller I go on the main jet the more I can open the throttle. I am currently at a 110 and could open the throttle 3/4 (less now that it's colder here). I now have jets from 85 to 150 in increments of 5 to work with. I also ordered a 25 idle jet since with the 20 I have to screw the air screw in all the way rich.
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Post by 190mech on Feb 20, 2015 21:48:09 GMT -5
Some redneck type folks(me)have been known to solder up a main jet and redrill it to a smaller size,other rednecks use a sewing needle to ream them to proper size,even more rednecks have used a torch cleaner for jet reaming,,these methods have been handed down thru generations back to George Washington's days when his outboard wouldnt run and he had to use paddles!!
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Post by niz76 on Feb 20, 2015 21:49:51 GMT -5
Lol Thanks for the redneck tuning tips 190mech! You know I will put them to good use.
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Post by niz76 on Feb 21, 2015 5:25:50 GMT -5
While out tuning I thought I may have seized my engine. Turns out I blew the head gasket out. Seems like it's on the side similar to what 90GTVert's did....it's too cold to be out in the garage right now so I'll check it out a little later. Luckily it was only a 20 minute scooter push
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