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Post by geh3333 on Feb 4, 2015 19:18:38 GMT -5
We touched on this before but recently the wrong info was given for why this is happening .
I have had my scoot modded for over three years now and the first koso variator I bought seemed to work great . I used 10.5 gram weights in the variator and the rpms where perfect. I'd reach my top speed near 7500 rpms . my second koso I bought " because of clutch issues destroying the first one " was a slightly different cast . I did some measurements and posted pics to show the differences. The second koso would not let me reach higher rpms unless I had 9 gram weights in , which seemed light for a 150cc CVT setup. The second koso also would not let the belt drop all the way in the variator. Recently alley said it was because of using a bigger carb " sayin it was the carb causing the lower rpms , then closed the thread . I didn't have a chance to set that straight . I have always used the 32mm carb and with with both koso variators . the 32mm carb spun the 10.5 gram weights with no problem in the first koso. there was also another member who had received the same type of koso I received and also had to use very light roller weights. I made a big thread about this over the summer and alley was a helpful contributor in the thread .
I wanted to set that straight so no one takes the false info first put out .
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Post by geh3333 on Feb 4, 2015 19:41:41 GMT -5
I'd like to get alley's response . and just to let him know this isn't meant to start an argument . I figure he just forgot about that thread I posted about the koso problem .
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Post by alleyoop on Feb 4, 2015 20:06:20 GMT -5
All I will say and have said it many times IF you have to put 9 gram weights in a 150cc variator to get some rpms something is wrong.
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Post by rcq92130 on Feb 5, 2015 14:55:48 GMT -5
So, GEH, I am asking:
If your carb. is producing too lean or too rich a mixture, will not there by symptoms (bogging, popping, etc.)? And if you are NOT experiencing these symptoms, doesn't it mean your carb IS producing the correct mixture?
And then --- just trying to remain logical here - if your "larger" carb IS producing the right mixture, how is it that it can be worse than a smaller carb also producing the right mixture? Certainly i can see the opposite to be true (if the smaller carb puts out a perfect mixture but simply can't handle the airflow demanded by the engine, choking it). But the larger carb, if mixing fuel & air correctly, ~~~~
How can it be worse??
The only way I see this is if the larger carb is NOT producing the right mixture. But then there would be symptoms ... right?
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Post by jerseyboy on Feb 5, 2015 16:04:53 GMT -5
There must have been something wrong with the variator Geh,,Im using a stock one and anything under 12g is screaming,,I would use 12g on the track if i was racing,,and I'm not even sure if they would push the variator all the way closed.
I have a set of 14g rollers I want to try soon as it warms up a bit,,the 13g sliders have been in there all last season,,they are good but I think a hair to heavy...they work great for cruising,,out of the hole they are a little sluggish but not bad.
I am going to get one of those cheap GoPro cams and make some videos this Summer...stick it right on my helmet,,or off the scoot.
Take care..
Tom
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Post by geh3333 on Feb 5, 2015 20:21:18 GMT -5
Yeh it was the variator , I including alley realized that months ago . the variator is a koso however it is an obvious different cast . whether it was intentional " a fake " or just a bad cast I don't know. It will not allow the belt to drop all the way and unless I have 9 gram weights in it won't reach the 7500 range on a straight run . my 32mm carb worked just fine with my first koso as I had no need to drop in roller weights with it. The reason in posted this was to make sure no one listened to the misinformation put out at the end of the following thread itistheride.boards.net/thread/7301/rcq92130-asks-why-low-rpms I'm sure alley just forgot about the thread he participated in about the possible fake koso variators being sold , and the issue I had with having to drop in roller weight with that variator. Also rcq's Dr. Pulley was said to be bad for top end according to alley , so I figure that's the reason for his issue with the lighter roller weights. It struck me as being odd that one would blame the problem on the carb when the real reason was known why this is happening , unless they just forgot " which happens a lot" no big deal . thanks for the replies and I'm glad we got that straightened out. |
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Post by jerseyboy on Feb 5, 2015 21:58:36 GMT -5
Well like I said,,
I am going to get a big carb this spring and mess around,,they are cheap enough so if it doesn't live up to its expectations I will just sell it or keep it for parts.
It should work good on my setup,,60mm with big port head and big intake..we shall see,,but its close to zero out there now.
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Post by alleyoop on Feb 6, 2015 12:56:54 GMT -5
Here you go Jersey,
61bbk, bought a 30mm carb would not put out slapped in a 28mm carb and created a Beast. Now that is a bad to the bone motor.
Alleyoop
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Post by geh3333 on Feb 6, 2015 18:20:10 GMT -5
Here you go Jersey, 61bbk, bought a 30mm carb would not put out slapped in a 28mm carb and created a Beast. Now that is a bad to the bone motor. Alleyoop Too bad u bashed the 28mm carb also . I recall u getting mad when someone mention using one . |
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Post by geh3333 on Feb 6, 2015 18:27:32 GMT -5
Did I miss where he mentioned the switch from a 30mm to a 28mm carb ? Or did u just make it up ?
Either way I like anything from 28 to 32mm they can all work on these setups . at least u see the bigger carb is better.
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Post by jerseyboy on Feb 6, 2015 18:53:13 GMT -5
Here you go Jersey, 61bbk, bought a 30mm carb would not put out slapped in a 28mm carb and created a Beast. Now that is a bad to the bone motor. Alleyoop Man I hope mine runs close to that when its all broke in,,pretty snappy for spinning a CVT and wheel..imagine if they had neutral,,they would really be snappy  I should get a 28mm carb it would match my intake better,,right now my intake is bigger than my carb... |
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Post by rcq92130 on Feb 6, 2015 19:44:48 GMT -5
28 is probably big enough to supply all a 150cc engine wants. There is some discussion about a 30mm carb having no extra power in the last 1/4 or 1/8 turn of the throttle - meaning that last bit of carb size offers no benefit.
On the other hand, i have yet to hear a rational explanation of what a 30mm, or 32mm carb - properly jetted - will not perform equally to a 28mm carb. Of course I may be wrong, but if not then the bigger carb may not help but will not hurt either.
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Post by alleyoop on Feb 6, 2015 19:50:36 GMT -5
Did I miss where he mentioned the switch from a 30mm to a 28mm carb ? Or did u just make it up ? Either way I like anything from 28 to 32mm they can all work on these setups . at least u see the bigger carb is better. You missed it, I don't make up stuff and or make excuses I tell it like it is. |
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Post by geh3333 on Feb 6, 2015 21:07:02 GMT -5
The video showing up on my phone just shows someone reving a scoot ?
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Post by geh3333 on Feb 6, 2015 21:09:57 GMT -5
The video showing up on my phone just shows someone reving a scoot ? Either way , a 28mm - 32mm have been proven to work great . and I'm glad alley has come around and finally admits a bigger carb is better then a stock carb on a highly modded scoot. Thanks alley |
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..BAD TO THE BONE..
