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Post by ccr on Nov 20, 2014 3:49:13 GMT -5
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Post by ccr on Nov 20, 2014 3:43:14 GMT -5
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Post by ccr on Nov 17, 2014 13:24:20 GMT -5
not the kill switch, i mean the ignition bypass switch, and yeah if i was going to steal it i would look for a killswitch also.
you could always remove the kickstart temporarily and remove the battery whenever your not riding it
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Post by ccr on Nov 17, 2014 12:53:48 GMT -5
you should be extra careful now, because wiring a switch into it will make it easier for it to be stolen.
in fact maybe the thief is counting on it. if i was going to steal a scooter, i wouldn't want to stick around long enough to rip the plastic apart and hot-wire it myself, i will just create the need for you to do my hot-wiring for me.
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Post by ccr on Nov 16, 2014 0:34:31 GMT -5
i had this problem before.
let me guess, it's fine the rest of the time, but when you push it hard after a few seconds all power is gone and it almost feels like the ignition has been completely cut. and it will continue to loose all power until you release the throttle fully and rev it back up again, by that time you have already lost maybe 30km/h speed.
i had this problem before! its carburetor related and i fixed it by swapping out the carb.
it's a dangerous problem to have for many reasons and if it's not fixed it can cause irreparable damage to your cylinder and head
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Post by ccr on Nov 14, 2014 3:05:49 GMT -5
a smaller carb will provide a faster start with a good low speed throttle response due to its higher flow velocity. a bigger carb will provide a slower start with a good mid range and high speed throttle response and allow you to reach higher horsepower levels on a BBK or even some stock setups. however, going too big will destroy your off the line acceleration to the point where you would never reach your top speed. the flow velocity would not be able to pull enough fuel from the jet no matter how big it is, and the fuel that does mix with the air will not atomize with the air causing an uneven and unstable burn. choosing the carb will depend on 3 main factors. 1, how fast you want to go / how fast you want to reach that speed. 2, how high your rpm settings are and what your gear settings are. and finally 3, what the ambient temperature of the intake air is. (in a hot country there is less air density and a bigger carb is needed to compensate for the lack of cold dense air) so if your driving in the city and you only get 2 blocks before you have to stop at the next set of lights, you should get a smaller carb, because your scooter needs to get up and go quickly. theres no point having a scooter that can go 200km/h but takes 5 minutes to reach that speed. however if you are driving longer distances and you have a lot of time between stops you can use a bigger carb to achievea higher top speed. how long are you prepared to wait for it? another thing is engine rpm. if you install a bbk and use an original crank, that makes it more of a high rpm build. because the bore is bigger than the stroke the piston does not have to travel so far between revolutions. this means a higher rpm can be achieved and it can accelerate through that rpm faster. if you lighten the variator weights and use a bigger carb, this will allow you to rev higher and the time required for the engine to get up to its ideal flow velocity will be reduced. for example my stock 100cc yamaha engine came with a cvk24 it was pretty slow to reach a top speed and not very fast off the line. topped out around 95km/h so i changed to a cvk30, big mistake on my part. i got an even slower start and only a little gain in top speed. 105km/h then i upgraded the engine to 128cc. and it was faster off the line and had a much better top speed. something like 108km/h. after that my friend (ex racing champion and racing bike builder) suggested i use a smaller carb and i was reluctant to at first. but after trying it on and a quick rip around the block..  it was like the beast had been set free finally and all the other mods i had made seemed to have finally paid off. i took it out of the city and hit it hard! KEHIN CVK26 it went off the clocks at 120km/h and kept going i can only guess it topped out at 125km/h so the moral of the story is, start small and work your way up. test as many sizes as you can before you buy one. i'm sure if you know someone with a keen interest in bikes they will have a few laying around that you can try out. if not then maybe a local junk yard can help you out Read more: itistheride.boards.net/thread/7015/high-upjet-when-doing-bbk?page=1#ixzz3J1ngiaSq |
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Post by ccr on Nov 14, 2014 3:03:19 GMT -5
I.E., If I did a bbk that brought the cc's up to 175, it would have a min/max of fuel/air it would use.. If my 24mm cvk was capable of delivering the required amount of fuel, how would a bigger carb help produce more HP? it would give you the horsepower sooner you wouldn't vacuum your house with a straw because it would take too long just like the air flow would be restricted on your small carb |
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Post by ccr on Nov 14, 2014 2:58:46 GMT -5
oh and as a straight answer to your question, about 125cc would give the maximum high speed performance gains from cvk24.
but a cvk could give a lot better and more balanced performance.
if your manifold won't take a cvk 26 you can have your carb machined to fit like mine was.
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Post by ccr on Nov 14, 2014 2:54:16 GMT -5
a smaller carb will provide a faster start with a good low speed throttle response due to its higher flow velocity.a bigger carb will provide a slower start with a good mid range and high speed throttle response and allow you to reach higher horsepower levels on a BBK or even some stock setups. however, going too big will destroy your off the line acceleration to the point where you would never reach your top speed. the flow velocity would not be able to pull enough fuel from the jet no matter how big it is, and the fuel that does mix with the air will not atomize with the air causing an uneven and unstable burn. choosing the carb will depend on 3 main factors. 1, how fast you want to go / how fast you want to reach that speed.
2, how high your rpm settings are and what your gear settings are.
and finally 3, what the ambient temperature of the intake air is. (in a hot country there is less air density and a bigger carb is needed to compensate for the lack of cold dense air) so if your driving in the city and you only get 2 blocks before you have to stop at the next set of lights, you should get a smaller carb, because your scooter needs to get up and go quickly. theres no point having a scooter that can go 200km/h but takes 5 minutes to reach that speed. however if you are driving longer distances and you have a lot of time between stops you can use a bigger carb to achievea higher top speed. how long are you prepared to wait for it? another thing is engine rpm. if you install a bbk and use an original crank, that makes it more of a high rpm build. because the bore is bigger than the stroke the piston does not have to travel so far between revolutions. this means a higher rpm can be achieved and it can accelerate through that rpm faster. if you lighten the variator weights and use a bigger carb, this will allow you to rev higher and the time required for the engine to get up to its ideal flow velocity will be reduced. for example my stock 100cc yamaha engine came with a cvk24it was pretty slow to reach a top speed and not very fast off the line. topped out around 95km/hso i changed to a cvk30, big mistake on my part. i got an even slower start and only a little gain in top speed. 105km/hthen i upgraded the engine to 128cc. and it was faster off the line and had a much better top speed. something like 108km/h. after that my friend (ex racing champion and racing bike builder) suggested i use a smaller carb and i was reluctant to at first. but after trying it on and a quick rip around the block.. it was like the beast had been set free finally and all the other mods i had made seemed to have finally paid off. i took it out of the city and hit it hard! KEHIN CVK26it went off the clocks at 120km/h and kept going i can only guess it topped out at 125km/hso the moral of the story is, start small and work your way up. test as many sizes as you can before you buy one. i'm sure if you know someone with a keen interest in bikes they will have a few laying around that you can try out. if not then maybe a local junk yard can help you out |
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Post by ccr on Nov 13, 2014 11:22:21 GMT -5
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Post by ccr on Nov 11, 2014 1:10:14 GMT -5
if you want a ZUMA engine (Yamaha 5ML) with BBK and stroker crank installed, i can send you one.
I live in the country they are manufactured in.
5ML modification is very popular here and i can get you anything.
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Post by ccr on Nov 9, 2014 22:02:12 GMT -5
could be a breather for the trans case. check the transmission cover for an air intake in the front or top of it
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Post by ccr on Nov 8, 2014 21:07:09 GMT -5
Then you have this motor which adjusting the valves is a piece of cake you can see the adjusters in this picture they are on the outside of the valve cover. You adjust them while the motor is running just like you would on a car.  that engine would be great in a small frame and a forward facing ram air intake! |
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Post by ccr on Nov 6, 2014 8:58:58 GMT -5
hey guys, i have a treat for you. here are some of the things i can send to you if you're looking to make your scooter look that little bit nicer or you are just looking to improve the safety and functionality of your ride. Stainless steel CNC precision cut bolts and nuts. M5,M6,M8,M10 all lengths for your scooter.  let me know what you guys think. more to come... |
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Post by ccr on Nov 6, 2014 7:27:43 GMT -5
Seems like i have a part for every problem here.  Not only do they look good, but they are a lot safer than those cheap ones you get with the rim. They've got weather weather resistant rubber seals inside. If you're interested then drop me a pm and we can figure out a price. Anything I send will be of Japanese quality, and i wouldn't sell anything i wouldn't use myself. Oh and did i mention they come in a variety of colors?  |
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