|
|
Post by mikestib1 on Oct 6, 2015 15:38:35 GMT -5
If you decide to get a big bore kit be advised a lot it 80cc kits are really 72cc kits. Be sure it comes with a 50mm piston, not a 47mm one. The 72cc kit gives you better acceleration from a stop sign but hills still kill it. I might try a different cam as the 72cc kit with new head has bigger valves. Still stuck with the stock restrictive muffler and a tiny 19mm carb. As we used totally people at the shops who asked how fast we could make their Harley's go......How much do you have to spend! It's easy for me, another $100!
The stock bore for a qmb139 is 39mm, the stroke is 41.4 for these 49cc engines.
|
|
|
|
Post by mikestib1 on Oct 1, 2015 14:34:16 GMT -5
, just buy a used motorcycle, but..... A lot of people are intimidated by the licensing process and there are waiting lists for testing in the US, then there's insurance for anything over 49cc
Let them buy 50's and modify them. It's a free country. They can always move up after having fun with their first scoot!
|
|
|
|
Post by mikestib1 on Oct 1, 2015 13:47:55 GMT -5
Could use some advice. Put a 72cc kit including new head with bigger valves. Definitely more torque than it had. Can anyone suggest whether a new cam, larger carb, or exhaust would be the best next step? Would do all three but running out of money. Thanks! Yeah I know I should have bought a 125 in the first place, but if there weren't so many hills where I live, the 50 would be fine. Also my wife doesn't have a mc endorsement and the 50 is the perfect weight, 170 lbs and low seat ht for her. I could leave it as is and try find $800 for a used Buddy 125 I saw on Craigslist
|
|
|
|
BBK Tuning
by: mikestib1 - Oct 1, 2015 13:31:51 GMT -5
Post by mikestib1 on Oct 1, 2015 13:31:51 GMT -5
Oops I thought of an easier way to determine if you're rich. Run your scoot flat out on a level road with the throttle fully ope.n, then back off a tiny bit and if you pick up a little more speed, you are rich
|
|
|
|
BBK Tuning
by: mikestib1 - Oct 1, 2015 13:24:21 GMT -5
Post by mikestib1 on Oct 1, 2015 13:24:21 GMT -5
If I'm not mistaken the main jet is at work at anything past half throttle. In my experience I use a new spark plug then run the bike at full throttle for a few minutes down the road. Shut off the engine immediately and remove the spark plug. If the ceramic insulator and side electrode are light to medium tan then the main jet is not the culprit. If it's whitish it's too lean, if it's blackish you're rich. After the BBK install I would not have changed the coil, cdi, etc until it was running right. A bad cdi can also cause the same problems as a mis jetted carb
|
|
|
|
Post by mikestib1 on Sept 11, 2015 17:22:49 GMT -5
Pinging, knocking sound only on uphill. Timing advance is electronic via cdi box. I pumped the gas do its  according to the pump, so I can try a different pump. Or it could be the carb is lean on the main jet. Both conditions would cause the engine to ping. Guess I'll just avoid uphill grades Ha ha Or get a big bore kit as its probably what I need in my area, lots of hills. |
|
|
|
Post by mikestib1 on Sept 11, 2015 13:14:39 GMT -5
50 cc Binelli with 139qmb motor. Runs great but pings or detonates on steep grades. I fill up a 5 gallon gas can as I know about a gallon in the hose is 87 octane . Could the cdi unit be advancing the ignition timing too much or not enough? Otherwise the scooter runs flawlessly. I use Stabil in the gas and oil level is good. The scooter has 300 miles on it but it has done this from day one. Help! And thanks!
|
|
|
|
Post by mikestib1 on Sept 7, 2015 15:19:01 GMT -5
I bought a Bintelli by Znen and only have 500 miles on it so far I've had absolutely no problems
|
|
|
|
Post by mikestib1 on Aug 11, 2015 9:55:01 GMT -5
Sorry, don't have any but the armor in my different textile and mesh jackets can be trimmed so you could buy some too large and use a utility knife, I think. Mine is just foam with a thin plastic shell. Just use your old armor as a template for the new armor.
|
|
|
|
Post by mikestib1 on Aug 9, 2015 12:46:45 GMT -5
The repair shop is charging one hour labor but since it's a one man shop they have low overhead. The owner has 2 pre unit BSA 500 singles. I'm sure he's making another profit on the parts but since he's installed this kit on many other kits he recommends it and can't afford unhappy customers. His shop is like a museum. Roanoke Cycle Sport. He also was approved for a Bintelli dealership and PDI ed the bike and it has run perfectly. I feel lucky to be 5 miles away. No crankcase boring is required..I also own a 900 Triumph Scrambler to ride. Yeah worked hard all my life and having a little fun. Don't mind spending some money locally and getting to know the local shops as you can't always get the best on line. Just my 2 cents or was it $200? As I said I'll review the mod in a few weeks. Until then, ride and have fun everybody! This is a four stroke 139qmb so f course it doesn't apply to 2T engines.
|
|
|
|
Post by mikestib1 on Aug 9, 2015 4:49:15 GMT -5
The stock engine buts out 2.4 kW or 3,1 HP and those are facts. I don't mind investing $215 parts and labor for the kit which includes 80 cc cylinder,piston, rings gaskets as well as new cylinder head with larger valves. The dealer is reputable and installs these kits with good reliability and a 50% gain in HP and torque. While rollers would make for quicker acceleration they do not compare to increasing the engine displacement. Will post results but I'm spending less this way than selling my scoot at a loss and buying a larger one. I have a motorcycle license anyhow. It seems people tell others not to perform certain upgrades when they have no firsthand experience want to hear from those who actually did the big bore mod.No offense meant
|
|
|
|
Post by mikestib1 on Aug 6, 2015 11:45:22 GMT -5
Just got a Bintelli 50 and it runs,stops, starts and has enough top speed and acceleration in my city with its 25 to 30 mph speed limits. But there are some fairly steep hills that make it struggle to maintain 20 mph. Thinking of a basic 80cc kit which is actually 72cc and includes cylinder, piston,rings and gasket. I dont want the cheapest. I may have to pay for installation so any info on time it should take by a competent mechanic would help. This scoot is for my wife as I plan to buy a Bintelli Scorch 150 to ride as I have a motorcycle license. Thank you all for your experience
|
|
|
|
Post by mikestib1 on Aug 6, 2015 6:30:03 GMT -5
I wonder if I should do the first oil change at 150 miles. The temp here is  degrees, the motor is air/fanned cooled and due to the city I ride in there are stop signs every 2 blocks. I figure it took me 12 hours of stop and go riding over the past 10 days to do the mileage. I know my lawn mower which is a small engine recommends first oil change at 5 to 10 hours. I want my scoot to last and the engine oil is easy to change. Thanks for your input. I use Castrol Actevo Extra 10w40 in all my bikes |
|
|
|
Post by mikestib1 on Aug 3, 2015 13:25:45 GMT -5
I just bought a Bintelli Prime 50 after a lot of research and being on a tight budget. So far it does what I thought. Lots of fun and great for city errands where the speed limit is 30 mph. Once it's up to speed it rolls. Acceleration is very slow. But as I expected with 3 hp and my 180 lbs and the scoots 170 curb weight. It starts right up if you open the throttle just a crack. I have a motorcycycle license so I will probably buy a Bintelli 150 Scorch as soon as she leads to ride the 50. The Valor has a cool retro look but also weighs 70 pounds more than the Scorch and has the same hp. Also the Valor has 10 inch wheels compared to 12 inch on the Scorch. At higher speeds the larger wheels give better stability. Bintelli has decent components and is well put together. Sure it's made in China but so are the smaller Kymco and Piaggeo scoots. Might have gone with a Kymco Agility but the closest dealer is a hundred miles away and the Bintelli shop is in town. I looked at the Buddy scooters but the larger ones are over $3000 after freight and prep. Genuine does have a good payment plan and free first service if you buy before the end of September, as does Kymco. Will probably buy Scorch 150 for about $1800 on the road price this fall.
Spent months looking for a good used scoot locally but mostly found scooters for $500 and low mileage but tells me they weren't reliable.
|
|
|
|
Post by mikestib1 on Aug 3, 2015 10:35:23 GMT -5
Picked up Sat. Man is it tiny. The seat has a hump which doesn't let me move back for a little more leg room, but I like to sit forward to weight the front wheel. Any ideas of an accessory peg I could mount on the front body?
|
|
according to the pump, so I can try a different pump. Or it could be the carb is lean on the main jet. Both conditions would cause the engine to ping. Guess I'll just avoid uphill grades Ha ha
degrees, the motor is air/fanned cooled and due to the city I ride in there are stop signs every 2 blocks. I figure it took me 12 hours of stop and go riding over the past 10 days to do the mileage. I know my lawn mower which is a small engine recommends first oil change at 5 to 10 hours. I want my scoot to last and the engine oil is easy to change. Thanks for your input. I use Castrol Actevo Extra 10w40 in all my bikes