Another plugchop

Does your Spree/Elite already run great, and you're trying to make it quicker/faster? Need a monster motor swap? Discuss your ideas here.

Moderator: Moderator

User avatar
axo
Spree
Spree
Posts: 193
Joined: Fri Jul 09, 2010 9:12 am

Re: Another plugchop

Post by axo »

bakaracer wrote:Put the 48 pilot in and open the screw to 1 7/8. Almost 2 turns. Try that. As for your speed,there must be something else going on. Mark the pulley with a sharpie to see how high the belt is riding.what brand belt are you using?
I finally got that 48.
I believe i got a bit of stronger launch but lost some power up there, takes longer to get full speed. Throttle is still being usable at 50% max. I wanted to check plug color but one of the springs came off the clutch and couldn't ride anymore.
The other day I marked the pulley with the sharpie like you said... and today i took a picture so here it is... belt is riding this high:

Image

And i got all this slack in the belt:

Image
1989 Honda Dio SP
AF18E - 82cc Taiwan kit - 24mm Oko - KRS pulley kit - Kevlar belt - 8.44:1 gears - 1000RPM Center spring - 7 grams roller weights - R1 sectional exhaust - 130lb pilot :)
User avatar
bakaracer
CBR1000RR
CBR1000RR
Posts: 3584
Joined: Tue Jan 27, 2009 9:51 pm
Location: tacoma,wa
Contact:

Re: Another plugchop

Post by bakaracer »

That belt looks kind of old. Edges looked frayed.measure the width with calipers.if its narrower than 14.8mm change it. Do a wot plug chop to see where you are on the main jet. My guess is that its 1 size to big right now since you upped the pilot.
Nothing like getting stroked!
Thanks to my sponsors
Nos Energy Drinks,themopedcompany.com,nwautoevents.com,Cycle Gear
90 honda dio sp 72cc
87 elite 50 s with 86cc watercooled mini stroke
87 elite 50 race bike mhr 72cc
91 yamaha tzr 250r
User avatar
bakaracer
CBR1000RR
CBR1000RR
Posts: 3584
Joined: Tue Jan 27, 2009 9:51 pm
Location: tacoma,wa
Contact:

Re: Another plugchop

Post by bakaracer »

What belt are you using, stock boss or using boss shims?
Nothing like getting stroked!
Thanks to my sponsors
Nos Energy Drinks,themopedcompany.com,nwautoevents.com,Cycle Gear
90 honda dio sp 72cc
87 elite 50 s with 86cc watercooled mini stroke
87 elite 50 race bike mhr 72cc
91 yamaha tzr 250r
User avatar
axo
Spree
Spree
Posts: 193
Joined: Fri Jul 09, 2010 9:12 am

Re: Another plugchop

Post by axo »

bakaracer wrote:What belt are you using, stock boss or using boss shims?
I will have to measure it then.. I know it got toasted with too much heat on the first setup attempt.
I am reading that sticky thread about the ZX mod and learning about the transmission deal a little bit.
I am using a kitaco Kevlar but the numbers are gone in it so i have no clue about its size.
I wonder if i got a stock boss or something else because the drive face barely engages the teeth
of the crank. It is one piece, there are no shims.
I have to install the clutch spring anyway so i will take measurements of everything and check with you guys because
a past owner of my scooter played with the transmission before.
Thank you.
1989 Honda Dio SP
AF18E - 82cc Taiwan kit - 24mm Oko - KRS pulley kit - Kevlar belt - 8.44:1 gears - 1000RPM Center spring - 7 grams roller weights - R1 sectional exhaust - 130lb pilot :)
User avatar
bakaracer
CBR1000RR
CBR1000RR
Posts: 3584
Joined: Tue Jan 27, 2009 9:51 pm
Location: tacoma,wa
Contact:

Re: Another plugchop

Post by bakaracer »

measure the boss length in mm.if your using a stock width belt with a zx boss,then that might be why your having trans issues.
Nothing like getting stroked!
Thanks to my sponsors
Nos Energy Drinks,themopedcompany.com,nwautoevents.com,Cycle Gear
90 honda dio sp 72cc
87 elite 50 s with 86cc watercooled mini stroke
87 elite 50 race bike mhr 72cc
91 yamaha tzr 250r
User avatar
axo
Spree
Spree
Posts: 193
Joined: Fri Jul 09, 2010 9:12 am

Re: Another plugchop

Post by axo »

Thank you for the constant help and professional tips Baka.. you are da' man :peace:
1989 Honda Dio SP
AF18E - 82cc Taiwan kit - 24mm Oko - KRS pulley kit - Kevlar belt - 8.44:1 gears - 1000RPM Center spring - 7 grams roller weights - R1 sectional exhaust - 130lb pilot :)
User avatar
axo
Spree
Spree
Posts: 193
Joined: Fri Jul 09, 2010 9:12 am

Re: Another plugchop

Post by axo »

Been away working and no time for the scooter.

I talked to Steve some time ago. He said my shaft is shorter because i have an earlier AF18 model.
This is how the boss stands in there, there are no shims or anything

Image

Measurements:
boss: 35mm
old worn belt seen in the picture: 13.9mm wide
used bando belt that i had lying around currently installed: 14.4mm

So i replaced the kevlar belt for the bando. The bando is wider and shorter. Lost some mid range torque i think with it, but there is less slippage for sure.
I found the rear bearing got some play so time to replace it... sucks.
1989 Honda Dio SP
AF18E - 82cc Taiwan kit - 24mm Oko - KRS pulley kit - Kevlar belt - 8.44:1 gears - 1000RPM Center spring - 7 grams roller weights - R1 sectional exhaust - 130lb pilot :)
User avatar
bakaracer
CBR1000RR
CBR1000RR
Posts: 3584
Joined: Tue Jan 27, 2009 9:51 pm
Location: tacoma,wa
Contact:

Re: Another plugchop

Post by bakaracer »

get yourself a new belt. new is 15.5mm wide. so your used 14.4mm belt is worn too.
Nothing like getting stroked!
Thanks to my sponsors
Nos Energy Drinks,themopedcompany.com,nwautoevents.com,Cycle Gear
90 honda dio sp 72cc
87 elite 50 s with 86cc watercooled mini stroke
87 elite 50 race bike mhr 72cc
91 yamaha tzr 250r
User avatar
Wheelman-111
Moderator
Moderator
Posts: 11325
Joined: Wed Oct 22, 2008 5:09 pm
Location: Deepinnaharta, Texas

Re: Another plugchop

Post by Wheelman-111 »

Greetings:

I could be mistaken, but my recollection is that the stock SR boss is ~33mm. A Polini-for-Rubkus kit I purchased measured a whopping 37mm and wouldn't work even with my widest belts. Using a 35mm boss on my crank requires the use of a ZX 18mm belt. The Stock belt, even if it measures a true 15.5mm wide, will slip between the front sheaves until the variator actuates. This isn't a good situation, because it'll cause the belt to wear quickly. Unlike vintage snowmobiles, these belts aren't designed to perform as a second "clutch".

When I shim out my 2001 AF16, the exposed splines protrude a bit farther than your picture shows, so perhaps Steve is correct in saying the AF18 crank is different.
Wheelman-111
Most of my money is spent on scooterparts. The rest is just wasted.
"ISO": '03 Vespa ET4 Malossi187 74MPH
Flash 9: 2001 Elite SR Contesta 72 ZX Tran, 9:1 Gears, Stock Airbox/Carb/Pipe 58.8 MPH
Punkin: 2010 Vespa/Malossi S78, 61MPH
User avatar
axo
Spree
Spree
Posts: 193
Joined: Fri Jul 09, 2010 9:12 am

Re: Another plugchop

Post by axo »

I believe a ZX 18mm belt would not come down to even touch the boss if i install the drive face, there is just not enough space.
I will try with the stock 15.5mm then.
Which one do you guys recommend? are there different brands or is it just the Bando belt...what is the part number?
Thanks a lot.
1989 Honda Dio SP
AF18E - 82cc Taiwan kit - 24mm Oko - KRS pulley kit - Kevlar belt - 8.44:1 gears - 1000RPM Center spring - 7 grams roller weights - R1 sectional exhaust - 130lb pilot :)
Post Reply