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Post by pistonguy on May 4, 2017 8:56:58 GMT -5
why no grease? i literally slathered the inside of the variator with grease. I tried that on my OE vary when I was tuning it, all it did was throw grease all over, get on the belt and Glazed it up real good. ended up getting the grease on the Clutch pads, threw the belt away and had a mess to clean up. I knew better but tried it anyway. |
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Post by pistonguy on May 4, 2017 8:51:13 GMT -5
  Here is one of my a +2mm KX450F 13:1-1 ruining .002 piston to wall. You are No Way going to cock that piston and upset the cylinder wall. |
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Post by pistonguy on May 4, 2017 8:05:31 GMT -5
The wear yo see is with just a few hours run time. I can hardly imagine what this would look like in a challenging climate like in the Tropics were these Scoots ar ridden everyday thru wet sandy salt water mixed roads. A modern O ring chain will win every time. And again I'm sure this has to do with me using a impact on my Vari nut. just plain silly to imply such a thing |
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Post by pistonguy on May 4, 2017 7:52:57 GMT -5
   
Now tell me any of this has anything to do with me using a Impact on my Vari Nut. My Scoot has never seen a wet road or been down a dirt road, The Schmancy Coated NCY Vari started taking the coating off within minutes. A few hours run time and the new rollers were flat spotted. the pictures don't lie. The Sliders in the first pi, you can see one rolled over and the others have uneven deep cut in them. |
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Post by pistonguy on May 3, 2017 8:41:14 GMT -5
I'm new on here and really need some help I bought a johnway 49cc scooter, because my other sunny scooter just got stolen 5 days ago....i have alwAys upgraded my scooters with a big bore kit... for that extra speed... now the johnway I just acquired has a 49cc motor in it plus it has all these vacuum hoses emission attatcments.. one on the exhaust.. which I sealed of and a bunch of other unneeded vacuum lines.. I installed the 100cc big bore piston..my question is do I haft to upgrade my valves too? I can't seem to get it to stArt up.. I have spark fuel and air it just won't turn over I'm thinking maybe the valves are too small... please any insight would be greAtly appreciated Yes you need Bullhonkey!!! your providing Misinformation. |
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Post by pistonguy on May 3, 2017 8:40:26 GMT -5
I'm new on here and really need some help I bought a johnway 49cc scooter, because my other sunny scooter just got stolen 5 days ago....i have alwAys upgraded my scooters with a big bore kit... for that extra speed... now the johnway I just acquired has a 49cc motor in it plus it has all these vacuum hoses emission attatcments.. one on the exhaust.. which I sealed of and a bunch of other unneeded vacuum lines.. I installed the 100cc big bore piston..my question is do I haft to upgrade my valves too? I can't seem to get it to stArt up.. I have spark fuel and air it just won't turn over I'm thinking maybe the valves are too small... please any insight would be greAtly appreciated Your BBK will start up and run just fine with the Stock Size Valves, you have another problem that is causing your Scoot Not to Start, you Can Upgrade to a Larger Valve Size Complete Cylinder Head. this Will compliment the BBK. You Cannot just drop Oversize Valves in your Stock Size Valve Seats of you Stock Head. What size in MM is your BBK? The 50mm BBK is a Actually a tad over 81cc, the 52mm BBK is 87.9cc The Thieving Scammers Name the 50mm kit a 100cc and the 52mm kit a 105cc. if you do the math there Lying. There is No such thing as a True 100cc or Larger 105cc BBK for the 49cc scoot. |
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Post by pistonguy on May 3, 2017 6:41:08 GMT -5
My Title states MC, My Registration States MC and my Plate States MC but in the end its a Scooter and so is yours, lets Not get in a Silly/Discussion of the Definition of what a True MC is and a Scooter is. It is what it is...... I love my Scooter and MC for what they are. scooter sounds so unappealing though, and "twist and go step through design" is too much of a mouthful. and they really aren't a motorcycle, only because motorcycles deserve their own place. so scooter it must be, although i need a MC endorsement to ride it. i don't know, i think a 300 to 350cc would be all i would ever need on a bike. even my 244cc was nothing less than a sheer thrill ride. and to think, my encounter with a chinese 50cc started it all. Very Nice! Thank you for your Continued Honesty.  I feel the same way, Scooter sounds Dorky, here in NC all Scooters are labeled as Licker Sickles, I can't even admit to anyone I own a Scooter without getting a sideways look of I must be a multiple DUI offender and complete loser. and to be seen on one is even worse. My encounters started long ago on my Tropical Scuba Dive travels in third world countries were most locals there only mode of transportation was a Scooter. I've rented them to do the same all over the world and have a great deal of fun on them. |
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Post by pistonguy on May 2, 2017 19:49:25 GMT -5
Aluminum stock pistons are too fragile to me and the chance of cocking them too great. Just think through what happens on a used engine if you unevenly stuff a rope inside a spark plug hole and it cranks up.. Its going to cock off kilter and the top ring is going to contact the ridge in the cylinder wall and potentially distort the ring on the high side and already be scraping the top ring down making a small score in the cylinder wall on the opposite side. If the piston top has any damage from running lean for any amount of time which on a 50 to 150cc GY6 with a vacuum fuel pump is pretty likely the chance of finishing the job and pushing it to complete failure or closer to it is too great. Its simply bad form to stuff things down the spark plug hole to leverage a piston to block the crank unless you really do not care about the engine. I you just need to get er done for one race or to bug out during a south seas flooding event thats one thing but on something you are expecting to keep running for the next 50,000 to 100,000 miles with few repairs I won't ever reccomend it (remember that I am looking at things as a Piaggio owner when I state these milages). The proper tools to do it right are not very expensive and well worth it. Its is a cheat or a gamble at best which you do at your own risk and don't reccomend to others without stating the risks. Im not advocating in any way shape or form of stuffing rope down a cylinder, there are several methods to get the job done. oil filter wrench, heck even your Belt around your waste wrapped around the Vari or flywheel will get it done. and as I stated a cheap Harbor freight Electric impact with a coupon is under $39. As far as I'm concerned your blowing theory of Fragile Stock Cast Pistons and have had 0 experience in a Piston cock off kilter, There Boat Anchors, The 50 or 150 CV carb is so forgiving I have Never seen one go lean to the point that is has taken the Temper out of the Piston or a Seizure and caused the smack your referring to.... what you running .250" piston to wall to clock a piston off kilter? utter bunk bro Your talking Smack with 0 hands on experience in what your referring to.... |
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Post by pistonguy on May 2, 2017 19:30:19 GMT -5
First have you ever owned a MC? my chinese 250 is a MC, so yes, i own a MC. if you are talking about a manual shift chain drive type of MC, no, and i doubt if i ever will. the question is, is this a symptom of poor design or a symptom of inferior quality. my guess is it's the inferior quality of the parts. this is a good example of poor design. i believe making the CVT a part of the carb intake will eliminate this type of problem. again, is this a symptom of poor quality, or poor design, or maybe even poor maintenance. flat spots on rollers do seem to be a problem, albeit a minor one. my scooter didn't like moisture, at all. if it even smelled like rain my scooter wouldn't start. the electrics was the cause before i revamped the electrics, even the moisture thrown up by the tires (no matter how minor) would kill the engine. My Title states MC, My Registration States MC and my Plate States MC but in the end its a Scooter and so is yours, lets Not get in a Silly/Discussion of the Definition of what a True MC is and a Scooter is. It is what it is...... I love my Scooter and MC for what they are. |
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Post by pistonguy on May 2, 2017 19:25:25 GMT -5
..., the little computer fans would be a joke and waste of time. Gotta Flow some CFM I'm unsure if your Scooter Electrical system will run it for long. I got some fans that BLOW and use very little resources. I can figure water-proofing the wiring but the fan motor itself would become the rub. Electrics are good and pushing at rates (not sure haven't checked inna while bit charges battery and runs all lighting for three years). Same battery and wiring... well a little splice with solder here and there. Just thinking airflow and have some ideas (apropos to the situation). Thanks for the comments... will figure something out: Got a little spare time once in a while and this is my partner/girl-fiend/hobby. It is my ride. LOL  Peace and safety to all and be blessed... don't forget to bless others. Ok I like that. you have been blessed |
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Post by pistonguy on May 1, 2017 20:53:00 GMT -5
Some use that method however it could introduce dirt into the cylinder and if the engine spins enough could bend the valves however the issue I have is that it can distort some of the more delicate piston tops and if not packed evenly wedge the piston and an angle damaging the cylinder wall. Odd how some who do this drop a valve or prematurely have to replace a piston/rings/cylinder or at the least have to start adding more oil between oil changes to the bike than they did before. Huhh aa wha? I sure haven't and won't see everything in my lifetime and Professionally analyzed thousands of piston failures you would have to put steel wire in the cylinder and put a 36" 1/2 drive breaker bar on the engine to distort the Piston Deck. they simply are not that fragile. the Top ring on these is Way down and your gunna have to do the above to Collapse the Top Ring Land onto the Ring. Im not at my home local to measure the top ring down on my 61mm piston at the moment but my CRF250R 14:1-1 Top ring is down .200" I would have to put it on the bench and beat it with a hammer to knock that top ring land down onto the top ring. Were dealing with .002" piston to cylinder clearance or with a good piston .0015" or .038mm there just isn't that much clearance that your going to cock the piston sideways and hurt the bore. Those Scooter piston Decks are Boat Anchor thick, I could put a big shot of nitrous on it without caving the Deck or Dome. I call bunk on this one bro. As usual my pics are not uploading so here is a link to some piston product. www.dansgaragetalk.com/topic/254-61mm-pistons-taida-cast-vs-ncy-cast-vs-taida-forged-high-comp/?page=1Heres another with some good close up pics. www.dansgaragetalk.com/topic/497-forged-piston/#comment-3974 |
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Post by pistonguy on May 1, 2017 20:21:35 GMT -5
This puppy will flow 240CFM. Will work with a 4" hose so you could mount it somewhere else and run the hose and Bell type duct work anywhere you may want it. These are Weather proof, the little computer fans would be a joke and waste of time. Gotta Flow some CFM. www.jegs.com/i/Allstar-Performance/049/ALL13009/10002/-1I'm unsure if your Scooter Electrical system will run it for long. There are many in-line type fans on the market for the race car industry that would get it done. |
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Post by pistonguy on May 1, 2017 20:15:49 GMT -5
Instead of a gaping hole  I was thinking of installing a bigger (one imaged is a mock-up) case-fan from a desktop PC. i74.photobucket.com/albums/i249/r4d1c4l/1_zpsdglwb4aq.jpg Points basically at the valve-cover so would forcing a little more air over the cover and surrounding area drop temps at all? Or Forget about it? I leave the door off to let extra air flow. Would have to maybe countersink and put the cover over it in the rain. Or silicon. Doesn't the flung-off oil get caught by valve-cover and return to reservoir? I actually had a similar Idea. What would really do th trick are those Blower Fans they use in NASCAR on the Brakes etc. The Blow out some serious CFM, I'm challenged with Ready Kilowatt and when I had a electrical guru look into the Electric Power to make it work my Scooter just couldn't supply the Juice to get it done. I leave my front cover off as in your picture |
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Post by pistonguy on May 1, 2017 8:47:38 GMT -5
The 1974 H1 500E had an improved frame with hints drawn from the 750. It was ungodly fast and handled well with the better tires and shocks I installed as Kevin Cameron noted in a recent article. Ya man I was wrenching for Rick Case Honda and Kawasaki in the mid to late seventies and we had a room full of Death Bikes as we called them. H-1 were second to the H-2's and the first group of KZ1300's we sold were all Death Bikes. Throw in a CBX or two. My H-1 was fast in a straight line but my RD-350 would destroy it on a Road Race track. |
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Post by pistonguy on May 1, 2017 8:44:13 GMT -5
it certainly seems that the CVT tranny wins in the maintainance dept. i need to make a correction here. i mentioned earlier you don't need any tools to replace a CVT belt if the CVT didn't have a cover. that's just plain wrong. you need the tools to remove the variator. not only do you need the socket for the crank nut, but you also nee a "tool" to hold the variator. i read an interesting solution somewhere, and it went like this: remove the sparkplug. get a 2 or 3 foot piece of rope. start stuffing it into the plug hole. this will prevent the piston from going past TCD. i've never tried this, so i can't vouch for if it works. for example, can this bend the valve stems? First have you ever owned a MC? old school non o ring chain and later model o ring chain? Owning both and having spent considerable time in the tropics on Scooter the Vari is in a constant state of destruct, in the tropics during hurricane season (June - Nov) it may rain several times a day, the scooter is going thru lots of water as most owners the Scoot is the only means of transportation, at darn near sea level the streets flood daily and ya have to ride thru with water half way up or more on the motor. Ive pushed water that came over the foot pad. if ya go by a fix it Scooter store, you will see piles of variators. The CVT cover has a useless gasket and is vented out the front and rear and Fills up with a nice mixture sea water with lots of sand, they eats themselves alive compared to a conventional chain and sprocket. Those who ride duel sports with a Milk crate off the front and rear have very little issues compared to scooter with a CVT All anyone has to do is visit the Scooter and mc fix it shops and look which one has the larges pile of junk parts, the Scooter wins that one every time. Ok trying to upload images of my Sliders that rolled over with big slits in them, my rollers that quickly flat spot, my fancy NCY, Vari. with the special coating that comes off into powder in short order. I've lost another 4 or 5 mph so its time again to get into the vary. My Scoot is kept impeccably clean and has never been on a rainy or dirt road in its life. Ill just post links to my CVt threads if I can't get the pics uploaded later. |
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