Disc brake Conversion: Joe dirt style

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.

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deuce217
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Disc brake Conversion: Joe dirt style

Post by deuce217 »

Does any body know a easy path to a china disc brake conversion for the 2001 50 SR. I know I sound cheap but I know those china discs work alot better than my drums at 64mph. I heard trafficjamz worked something like this but could not find the thread. Thanks

p.s. My wife and I went to the gym on my purple elite tonight and hit around 50-55mph... Thats about 330lbs!!! My temp got to 397 F. What is melting point?
2000 Elite SR50 -THE PURPLE NURPLE
50mm BBK (tai)
26mm OKO (round slide) 135 Main Jet
V-8 pipe
39/18 secondary gears (7.583:1 ratio)
36 grams in Prodigy variator
Malossi Delta Clutch & WIng Bell- Thanks RED EFT
65mph GPS (on the freeway)
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paulpauly7
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Re: Disc brake Conversion: Joe dirt style

Post by paulpauly7 »

400 is the danger zone
your pretty darn close
86 Nifty Fifty (spree)
ZX disk brake
Kitico 120kmh speedo
AF18 ZX ported
Polini corsa
Malossi crank
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24mmOKO
40pilot118main
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71.3mph
92 yz125, 94 crm250
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wiguy05
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Re: Disc brake Conversion: Joe dirt style

Post by wiguy05 »

Factoring in a small amount of error in the temperature reading and you almost assuredly have passed 400*F :lol:
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Bear45-70
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Re: Disc brake Conversion: Joe dirt style

Post by Bear45-70 »

Bigger main jet ASAP before anymore WOT runs.
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Breezy
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Re: Disc brake Conversion: Joe dirt style

Post by Breezy »

Is this what you were looking for?

viewtopic.php?f=4&t=13577&p=110928&hilit=+disc#p110928

I personally wouldnt know about the Chinese brakes, I have only done a Dio ZX disc swap on my NQ50...
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SpreeMadness520
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Re: Disc brake Conversion: Joe dirt style

Post by SpreeMadness520 »

Ive seen bores hit 450+

I shut mine down anything past 405 just to be safe though :thumbwink:
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JJ Joseph
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Re: Disc brake Conversion: Joe dirt style

Post by JJ Joseph »

deuce217 wrote:Does any body know a easy path to a china disc brake conversion for the 2001 50 SR.
Using the disc setup from a '90s Dio AF35 might work, but when you look at one (see photo), there's a lot of parts need to be swapped out. There's a couple for sale on craigslist, but at $750 it might be cheaper to sell yours and buy the AF35 rather than buying it for parts and doing the conversion.
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kingkamehameha
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Re: Disc brake Conversion: Joe dirt style

Post by kingkamehameha »

SpreeMadness520 wrote:Ive seen bores hit 450+

I shut mine down anything past 405 just to be safe though :thumbwink:
You turn your bike off while its that hot? I let my bike run while
Cooling down so that way the fan circulates air around he cylinder and also so the piston and cylinder cool down at the same speeds.
ua mau ke 'ea o ka aina i ka pono o hawaii
sanjuro
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Re: Disc brake Conversion: Joe dirt style

Post by sanjuro »

The steering stem and fork angle is all wrong if you are trying to do the sa50 elite. The '87 se50 elites are straight swaps for the live Dio fork/tree setup.

You'll have to buy the kit that's available in Hawaii$$$$.

Personally, you're better off buying an '87 elite.
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deuce217
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Re: Disc brake Conversion: Joe dirt style

Post by deuce217 »

Thanks guys, I purchased a used brake lever and caliper assembly with front rotor, off ebay for 25.00 for a 50cc china bike. I am gonna try to make something work.
2000 Elite SR50 -THE PURPLE NURPLE
50mm BBK (tai)
26mm OKO (round slide) 135 Main Jet
V-8 pipe
39/18 secondary gears (7.583:1 ratio)
36 grams in Prodigy variator
Malossi Delta Clutch & WIng Bell- Thanks RED EFT
65mph GPS (on the freeway)
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deuce217
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Re: Disc brake Conversion: Joe dirt style

Post by deuce217 »

JJ Joseph wrote:
deuce217 wrote:Does any body know a easy path to a china disc brake conversion for the 2001 50 SR.
Using the disc setup from a '90s Dio AF35 might work, but when you look at one (see photo), there's a lot of parts need to be swapped out. There's a couple for sale on craigslist, but at $750 it might be cheaper to sell yours and buy the AF35 rather than buying it for parts and doing the conversion.
I like that dio! It looks awesome.
2000 Elite SR50 -THE PURPLE NURPLE
50mm BBK (tai)
26mm OKO (round slide) 135 Main Jet
V-8 pipe
39/18 secondary gears (7.583:1 ratio)
36 grams in Prodigy variator
Malossi Delta Clutch & WIng Bell- Thanks RED EFT
65mph GPS (on the freeway)
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deuce217
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Re: Disc brake Conversion: Joe dirt style

Post by deuce217 »

Image

Image

Image
Image
2000 Elite SR50 -THE PURPLE NURPLE
50mm BBK (tai)
26mm OKO (round slide) 135 Main Jet
V-8 pipe
39/18 secondary gears (7.583:1 ratio)
36 grams in Prodigy variator
Malossi Delta Clutch & WIng Bell- Thanks RED EFT
65mph GPS (on the freeway)
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deuce217
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Re: Disc brake Conversion: Joe dirt style

Post by deuce217 »

I hope you guys enjoy the pics! I think I am on to something..
Image
Image
Image
Image
2000 Elite SR50 -THE PURPLE NURPLE
50mm BBK (tai)
26mm OKO (round slide) 135 Main Jet
V-8 pipe
39/18 secondary gears (7.583:1 ratio)
36 grams in Prodigy variator
Malossi Delta Clutch & WIng Bell- Thanks RED EFT
65mph GPS (on the freeway)
Fishman43
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Re: Disc brake Conversion: Joe dirt style

Post by Fishman43 »

Two things:

1. :worship: :love: :geekdance: :rock: :ndance:

2. What is this?
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Mystic
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Re: Disc brake Conversion: Joe dirt style

Post by Mystic »

awesome work so far dude, I forsee you making parts for all our disk brake conversions :D
1986 Spree/ Eve af16 swapped 65cc Prodigy vari 8g 9:1 Ruima gears
21mm OKO 42/100 32:1 45mph kymco zx exhaust
1994 Elite S 17.5mm Arreche, Daytona reeds, SEF ramp, pump plugged :D
1987 Elite SE50 af16 swapped
1989 Elite E SB50p
2003 Yamaha Zuma
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