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Post by scooter on Nov 2, 2014 22:36:10 GMT -5
howdy, i'm as ignorant as the next guy but it is my understanding just from experience that the 4.00-12 would be a tube type tire. if your wheel needs a tube because it is not a tubeless rim, even the tubeless tire will have a tube in it. just saying--- lotsa miles and smiles to ya ken The tire is a kenda k761-013. I don't know how to tell if it's a tubeless tire or not. It is frustrating. Even Kendatire.com doesn't say on the listing whether or not it uses a tube. Looking at the original tire online, it is clear that the person who sold the scooter to me lied about it being a newer tire. It needs to be replaced pronto. I am looking at one with a taller sidewall, same tire, taller sides, for about $25 more than the original. It has a higher weight rating than the original which is nice, and it will gear me up a little, which I'm not sure is good yet. |
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Post by scooter on Nov 2, 2014 21:03:01 GMT -5
I'd like to try this gyro stabilized enclosed model. I can just see me, cruising along in the rain at night, playing my favorite tunes and feeling like a kid again with my new toy.  |
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Post by scooter on Nov 2, 2014 20:54:02 GMT -5
Wheels that are balanced using weights go out of balance as the tire wears down. This doesn't happen with DynaBeads or RideOn . Has anyone tried either product? I have two small bottles of it but have not put it in yet. |
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Post by scooter on Nov 2, 2014 20:39:48 GMT -5
Thanks, Kat! I wrote the ad several times, trying different sales approaches, and I sold the bike last week. I included lot of nice pictures too. I just didn't get a lot of bites, but the 8th or tenth looker took her.  |
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Post by scooter on Nov 2, 2014 20:09:13 GMT -5
Thank you. Does increasing the height of the sidewall have any ill effects on tire performance or stability? Will a taller tire be more likely to wrinkle or fold or do any other weird stuff while I'm driving on it? a wider tire gives more stability and grip when cornering, that's why racing bikes have fatter rear tires. but with it being wider, 2 things occur. 1- more rotating mass, meaning the wheel needs more turning power to go and more stopping power to stop. 2- bigger tire profile, increases drag when the wind hit's it. taller tires can also have more rotating mass and the benefit of them comes from more distance traveled to wheel rpm. they also make the ride height slightly higher. and they create a stronger gyro effect making bumps less of an issue another thing i forgot to mention was that you need to check the suspension clearance if you install a bigger tire. the last thing you wand is for your wheel to scrape the bottom of your seat whenever you go over a bump Sounds good. It looks like I have at least 5 cm of clearance around the tire and plenty of room between the tire and the mud guard, so one cm larger should fit fine. Now I just have to figure out how that will affect acceleration and whether I can pull the extra diameter on the top end. |
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Post by scooter on Nov 2, 2014 20:01:44 GMT -5
Sounds sweet, can't wait to see the results. I forgot to mention a while back that after I fixed the vacuum line running from the carb, to the "Tee", before fuel pump, the results..... I took the scoot out for a 18 mile ride and it never cut out at WOT... A few days later, me and wife were riding and she's got about 100lbs on me, it cut out on her just as if I never fixed anything...... I never installed that Mikuni pump yet.... Even though it's a Vacuum operated pump, it doesn't require constant vacuum and is pulse vacuum operated, meaning it needs less vacuum..... I didn't select it just because it's higher quality... It operates differently...... However, I think an electronic pump is the better way to go so I'm not going to have any vacuum operated fuel pumps..... I just need to figure out the whole fuel regulation thing...... The reason the vacuum drops as you open the throttle is because you are letting in more air. Imagine your throttle plate is the end of a shop vac hose. At idle, you have the tiny tip on the hose, and you can suck a gnat's legs off from across the room. At WOT you have just the hose with no end on it. Lots of air going in but at lower vacuum. These pumps we have on our scoots operate on pulses. Every time your intake sucks in air, the pump's diaphragm is pulled and afterwards released, thousands of times per minute. As you saw in my gauge testing results, a smaller 3 inches of vacuum at 7,000 RPM produces much more fuel pressure than a much larger 11 inches of vacuum at only 4,500 RPM. More small pulses is better than fewer big pulses. I suggested, to Shannen, that one could use a valve to bypass extra fuel and pressure back to the tank, but he says a regulator will do the job. My tests show that 4psig of fuel pressure works on the stand at 8,000 RPM on my 150cc. There are some adjustable ones on ebay for under $30, like this one that comes with a gauge www.ebay.com/itm/LIGHT-WEIGHT-ADJUSTABLE-BLUE-FUEL-PRESSURE-REGULATOR-0-140-PSI-GAUGE-HOSE-KIT-/150984543863I'm sure they come in all kinds and prices and you can find one that works well. Here's a holley carb one with no gauge www.ebay.com/itm/Quick-Fuel-Carburetor-Fuel-Pressure-Regulator-30-803-/151459407331 |
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Post by scooter on Nov 2, 2014 19:24:12 GMT -5
I need to figure out some math. I know even a mm on the variator can seriously affect acceleration and top end, and the clutch bell turns about 8.75 turns for every turn of the wheel.  I am just not sure yet what that means. I will edit this when I figure it out but you guys feel free to interpret it for me if you can. |
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Post by scooter on Nov 2, 2014 19:17:33 GMT -5
Thank you. Does increasing the height of the sidewall have any ill effects on tire performance or stability? Will a taller tire be more likely to wrinkle or fold or do any other weird stuff while I'm driving on it? |
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Post by scooter on Nov 2, 2014 13:20:01 GMT -5
Ok, I just ordered a K&N fuel pump. Now, I need to figure out how I'm going to hook this thing up.... You could use a vacuum operated electrical switch to turn it on and off. I'd look for one that turns on with 1 inch or less of vacuum. That would keep it from running if the ignition switch is left on and the motor is not turning. There are a bunch of them on ebay made for bikes. |
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Post by scooter on Nov 2, 2014 13:07:28 GMT -5
Yup, thank you Scooter for posting this. It also has swayed me to going electric. Like I've said many times before, if our problem stems from a drop in vacuum, a better vacuum operated pump won't solve our issues. Thanks and you know, I believe one could add a vacuum operated switch to turn the pump on whenever the engine was being turned over. That would eliminate accidentally leaving the pump turned on in case the ignition switch is left on. Just a thought. I just left my keys in the ignition for several hours on Friday. Good thing for me it didn't kill the battery. I'll have to add an ignition/key buzzer to my list of stuff to add to the scooter some day. Maybe have it buzz when key switch is on and have a vacuum switch shut it off while the engine is running. haha |
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Post by scooter on Nov 2, 2014 12:49:09 GMT -5
I am not sure but it looks like I need a new rear tire. It's not like a car tire. It's some fancy thing with strange nubbles on it. Is that word? If not, I call it! It loks kind of bald but it also looked that way when I got it. It stops the bike really well, even in rain and seems to work fine but it looks like maybe it's time to replace it. I don't know.
I will post a picture of the tire here in a bit.
The bike plate says I need a 4.00-12 (UPDATE THIS IS THE RIM SIZE MT2.75*J12) rear tire and I have a 120/70-12 tire now. Is that the right tire? Also, can I use a taller tire for higher gearing? If so, what sort of options do I have? My rim says it is tubeless, and I assume the tire is tubeless.
Also, what about mounting? Can any old tire dealer mount a scooter tire? Is it something I can do myself? Those aluminum rims look easy to damage.
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Post by scooter on Nov 2, 2014 12:08:55 GMT -5
Also if you know someone with a pickup truck or trailer, if may be wise to see if they are able to come help you should something happen along the way. Maybe not a breakdown but maybe a accident. Insurance is good to have too. I am covered for everything but uninsured motorists and I get free towing if I break down, which I have used twice already, saving me 150 dollars in towing fees. I agree with you, Earlwb. My cvt drive gets really warm. I can't even touch the clutch or variator after a short drive. If I didn't drive in the rain, I'd chop holes and vents in my cover. I got some of that orange "Ride On" goo, to put in my tires, too. |
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Post by scooter on Nov 2, 2014 12:00:11 GMT -5
What makes you think the Chinese vacuum fuel pump will be more reliable than an electric fuel pump? This thread started because "scooter's" vacuum pump failed. I now have an electric pump because that also happened to me. No car has been manufactured in over 20 years with anything OTHER than an electric pump (same with motorcycles). As I see it - modernizing your scooter should significantly IMPROVE reliability, not degrade it. Actually it started because a scooter I sold was leaking a few drops of gas while turned off, before I sold it, and I thought it was coming from the petcock. I didn't confirm that but the customer returned with the bike's brand new fuel filter leaking like crazy. I guess it couldn't take the massive pressure of the vacuum powered fuel pump. My pump is fine. For now. There is no need to be defensive. I totally understand where you are coming from and the electric fuel pump idea is slowly growing on me as I mull over the pros and cons of both types.  If someone disagrees with you, I am sure you will win them over in time with a calm logical argument in favor of your preferred system, just like I will eventually win Alleyoop over on using shims.  |
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Post by scooter on Nov 2, 2014 1:16:01 GMT -5
+8.2mm Stroker Crank 57.4mm x 66mm = 170.8cc 58.5mm x 66mm = 177.4cc Wow that's a nice 20cc leap just by adding the crank to the stock cylinder. |
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Post by scooter on Nov 2, 2014 1:02:54 GMT -5
When I get my gauges installed and operating, I will add to this thread also. This thread should be pinned in the tech help IMO. Thanks, Dmartin. That's very encouraging and I appreciate it. |
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