Chinging sound at full throttle

[maddog]

Watch my new post=

[zajaco]

I have a tac. What do you need to know?

What rpm's you are turning at top speed.

I knew you were going to ask that... I forgot to look down at the tac when I was cruising along. The joy of riding got to me I'll post that tonight after work.

I see our setups are pretty similar minus the strokers and different choices on the exhaust and vari. I guess I am confused on why you think my 8.2:1 gears are tall if you are running 8.4:1.

Are the 44mm strokers plug and play? Or, do they require that your case be machined down to accept them?

[Wheelman-111]

Greetings:

The 44mm cranks are "plug-and-play" in the sense that the cases do not need machining. There is an art, however, to setting up the cylinder base gaskets correctly in order to maintain a viable compression ratio as well as correct port timing. The additional 2.7mm of stroke must be compensated for, and the math isn't linear.

Patrick Day wanted to sell me a Corsa bore along with a Ministroker along with some experienced setup advice. Burnt_Toast showed us all that a Corsa can work very well with a Stroker, even with 9:1 gears. But having cut the boost port on my '98 cases, I opted to go another way (cheaper, predictably...) with an all-Ruima setup. Now I'm not so sure I made the right choice, but hopefully my mechanical "skills" and not the quality of the Asian metallurgy is at fault. The former I can learn from and fix, hopefully, but the latter... It's hard to equal the care and attention to detail you get from the Italian brands. I'm a little jealous.

8.3:1 gears is the right choice for your build. A ZX trans would bring back some take-off, but the real trick is to get the tuning just right. That spring with such light weights may be your issue. I suggest you make some radial marks on your variator and driven pulleys with a Magic Marker to see how far the belt goes.

[Trafficjamz]

[quote="Trafficjamz"][quote="bakaracer"]If he is running the pg long, that pipe likes the little lighter rollers.with the 9to1 gears try half 6 and 7 g rollers.quote]

8.2:1 gears very tall

quote]

I don't think your gears are too tall. I was just telling Baka that you had 8.2' not 9.1's

The lower the number the taller the ratio

8.2's should do 60mph @ 8583 rpm or so depending on the size or you rear tire.

8.2's should do 47mph @ 6723 rpms

IF you rpms are over 6700 rpm and you are only doing 47mph,then your cvt is not shifting all the way into high gear.

[zajaco]

8.3:1 gears is the right choice for your build. A ZX trans would bring back some take-off, but the real trick is to get the tuning just right. That spring with such light weights may be your issue.

A lot of people have spoke to the take off ability. Even with the 7g rollers take off is still pretty good IMO. I have to be careful because the front end does get light.

8.3:1 gears is the right choice for your build. A ZX trans would bring back some take-off, but the real trick is to get the tuning just right. That spring with such light weights may be your issue. I suggest you make some radial marks on your variator and driven pulleys with a Magic Marker to see how far the belt goes.

Great idea about the radial marks. I will try that this weekend with different weights and post back.

[zajaco]

thanks for the clarification Trafficjamz. I am picking up what you and Wheelman are putting down. Thanks for sticking with me. I'll post my results on Sunday. My brothers graduation is this weekend. Silly family getting in the way of scooter progress.

[zajaco]

8.2's should do 60mph @ 8583 rpm or so depending on the size or you rear tire.

8.2's should do 47mph @ 6723 rpms

IF you rpms are over 6700 rpm and you are only doing 47mph,then your cvt is not shifting all the way into high gear.

I achieved 50mph at about 9700 RPMS with the engine at about 340 degrees F. I put 9g weights in my vari and my Vapor gauge is set to 1 Pulse Per Revolution. My tire size is 3.50J-10. I did order another belt to be on the safe side. Would anything else cause the bike not shift into high gear?

I'll do Wheelmans suggestion later this weekend. Hopefully Sunday.

[Trafficjamz]

8.2's should do 60mph @ 8583 rpm or so depending on the size or you rear tire.

8.2's should do 47mph @ 6723 rpms

IF you rpms are over 6700 rpm and you are only doing 47mph,then your cvt is not shifting all the way into high gear.

I achieved 50mph at about 9700 RPMS with the engine at about 340 degrees F. I put 9g weights in my vari and my Vapor gauge is set to 1 Pulse Per Revolution. My tire size is 3.50J-10. I did order another belt to be on the safe side. Would anything else cause the bike not shift into high gear?

I'll do Wheelmans suggestion later this weekend. Hopefully Sunday.

Yeah the stiffer center spring makes shifting to top gear a little harder.
The math just does't work out, 9700 rpms should push 8.2:1 gears to 60 mph.
You cvt is not shifting all the way for sure.
Maybe you variatior boss is too long ,or you belt is stretched
You didn't lose the ramp plate slider guide things did you?
This scooter should be waaaay faster

[zajaco]

Test results are in....

This picture shows the vari boss inside the vari with the ramp plate pushed all the way back. There is about a 1/16 inch gap from the top of the boss to the top of the vari. Over all length of the boss is 1 and 5/16 inches.


Here I marked the vari at 1/4 inch increments from where the vari starts to slope downward. Sliders are intact on the ramp plate and it does move freely when fully assembled.


This picture shows the stationary driven face. I did notice a groove about 13/16 inch away from the shaft. However, the movable drive face is smooth. the movable drive face does move freely on the shaft.


I marked the stationary drive face at 1/4 inch increments as well.





After re-assembly I achieved about 51mph at 10500 RPMs with 8g weights in the vari.

The belt rode up about 1 inch away from the start of the slope on the vari.


The belt rode down about 1/2 inche away from the driven face shaft.


I found my belts distinctive shape to be interesting.

[Trafficjamz]

??????? Are you using the Keli with a restrictor plate?

If you are using that piece , That is you problem for sure

[Trafficjamz]

I'll check the starter and kickstand tonight. I bought a multipack of rollers from Daywot so I will throw in the next set higher and see if that improves my speed.

The gears are actually 8.2:1
http://cgi.ebay.com/ebaymotors/FINAL-DR ... arQ5fParts

Thanks for the help guys.

do You have a 72cc corsa?

I would expect your setup to go at least 65mph

What size tire? Is your restrictor plate in place?

I asked you that way back on page one

[zajaco]

My apologies... I did not consider that the restrictor plate. Merely, the part the holds the ramp plate in place. My thoughts were mis-confirmed when I saw this. Perhaps Fishman was telling me not to use it?

No restrictor on the Keli variator

I will take that out and post my results.

[Trafficjamz]

My apologies... I did not consider that the restrictor plate. Merely, the part the holds the ramp plate in place. My thoughts were mis-confirmed when I saw this. Perhaps Fishman was telling me not to use it?

No restrictor on the Keli variator

I will take that out and post my results.

Hold on tight It gonna be 100% different.

[zajaco]

I will have to admit Trafficjamz I was a little disappointed on my first test ride. I took off the restrictor and put in 9g weights to make sure there was enough weight to shift. However, I felt no improvement in speed while riding.... And then I figured out why.


The extra tension on the belt made it stretch to the point of fraying. I look over to my pile of parts and remember I have a junked out 88 elite motor and YES, it has the same size belt! This belt is even older than the first one but I though what the *. I go to put it on and notice that is is a lot tighter.

On my second test ride with 9g weights I achieved 55mph at about 9100 RPM and I felt like it could have gone faster if I had more road. I get back and ALL of the marks I made earlier on the vari and driven face are gone.


Trafficjamz, you mentioned earlier that 8.2's should do 60mph @ 8583 rpm or so. My new belt arrives Tuesday. Do you think that is the last piece that will push me over 60? Is there anything else I need to look at?

[evilone]

Isn't that just a grease cover? The restrictor plate looks completely different.