my 99cc predator cruiser

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Skarrd

Skarrd

Member
Oct 13, 2010
501
2
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Chandler, AZ
Pretty much have my bike finished now. just waiting on s new sprocket to fix the ratios on it.

It's a schwinn clairemont running a 99cc predator motor.

some special things about this build.

CVT on a 5/8" crank shaft. I got a couple shims to bring it from 5/8" to 3/4", then drilled and tapped holes for set screws to go into the normal keyway so it wouldn't shear anything off.

Full jackshaft system. It's built along the same design (and has some same parts) as the SBP jack shaft system. I simply ditched the mounting plate that the CVT came with, bought a longer belt, and a longer jackshaft and put it all together.

currently, it goes CVT->10t->48t->30t->40t
it gives me anywhere between about 17.8:1 but it goes too far down to 5.7:1
Once i get the 60t sprocket it'll be around 25.7:1 down to 8.68:1
 

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wheelbender6

wheelbender6

Well-Known Member
Sep 4, 2008
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TX
That is very raw and very sharp. Did you accomplish all that without welding? If so, a lot of members will want to do something similar.
 
Skarrd

Skarrd

Member
Oct 13, 2010
501
2
18
34
Chandler, AZ
wheelbender6 said:
That is very raw and very sharp. Did you accomplish all that without welding? If so, a lot of members will want to do something similar.
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you are correct, no welds at all. just bolting, cutting, and grinding. c:

really wish i had access to a welder. i need to get the exhaust welded up
 
Skarrd

Skarrd

Member
Oct 13, 2010
501
2
18
34
Chandler, AZ
andrewflores17 said:
youre going to love the preadtor i can belive i ever rode a motorized bike without one its a whole new obsession with these things .

good looking bike
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i already love that beast! it has soooo much more torque than the HT could ever dream of!

thinking of also getting the thinner headgasket from AGK so i can bump up the compression.
 
azbill

azbill

Active Member
May 18, 2008
3,358
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Fountain Hills, Arizona
good looking build !!!

what size/where did you get the ammo can ???

I am liking the predator a lot,,,a little over 1200 miles on mine :)

PS,,,we need to get together for a nice ride;)
 
Skarrd

Skarrd

Member
Oct 13, 2010
501
2
18
34
Chandler, AZ
azbill said:
good looking build !!!

what size/where did you get the ammo can ???

I am liking the predator a lot,,,a little over 1200 miles on mine :)

PS,,,we need to get together for a nice ride;)
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for sho' man! lol might be a long ride to meet up XD

the ammo can is a 7.62mm, don't remember where i bought it, but i see them on amazon alot, plus i think there's a couple surplus stores scattered around the valley.

I need to change the oil soon too. i'm thinking a little bit of drilling/tapping a hole on the bottom of the engine and drilling a hole through the mounting plate so i can change the oil without it spilling everywhere.
 
wayne z

wayne z

Active Member
Dec 5, 2010
1,743
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louisiana
I drain my oil out thru the oil fill hole. I simply take out the fill plug, lay the bike down on the left side over a large plastic pan, and pick up the rear wheel enough to drain out the oil .
Way quicker and easier than dealing with the drain plug.

Also, Harbor Freight has a hand operated suction pump that could be used to pump out the sump from the fill hole.
 
B

BeaverRat

New Member
Jun 27, 2011
147
0
0
WA
I am working on this exact same build as we speak. I was pretty happy when I discovered that HF is now shipping the 99cc engines with ACTUAL 5/8" shafts. The 5/8 to 3/4 bushing to adapt the shaft to the CVT slid right on with no sanding of the shaft. Congrats on doing it first!
 
Skarrd

Skarrd

Member
Oct 13, 2010
501
2
18
34
Chandler, AZ
killercanuck said:
Looking good Skarrd! Your neighbors must love you booting around without an exhaust :)
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LOL yeah, even without any muffler, it was still quieter than the 2 stroke ever was, took one of my old happy time mufflers (no cat on this one) and clamped it on. exhaust is quiet now, but the noise now comes from the intake.

I need to get around to measuring the bolt spacing so i can see about getting some type of adapter made to run the dellorto clone carb i got (has a bigger bore than the stock HF carb). think i may contact manic mechanic and see if he can make one of his billet adapters to the size i need.
 
wayne z

wayne z

Active Member
Dec 5, 2010
1,743
5
38
louisiana
I use the 3/4" mower muffler . It makes a little more noise than the 1/2" one, but the preddy runs a LOT better with it.
 
maurtis

maurtis

New Member
Dec 14, 2011
707
0
0
Kyle, TX
Very nice! I am definitely thinking my next build will be a 4 stroke, either a Preddy or one of those geared Loncin jobbies. I really like the no-weld aspect of your build, since I am in that same camp.
 
Skarrd

Skarrd

Member
Oct 13, 2010
501
2
18
34
Chandler, AZ
Mightyboosh said:
where did you get your parts for your clutch and jack shaft
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the CVT i got off ebay for about $100 (worth it)

the jackshaft is a bit of a scavange job. i had ordered the mounting brackets for a 4 stroke from sick bike parts, but i only used just the jack shaft bracket. (i'm sure the 2 stroke version would work still). the other parts i got from www.mcmaster.com

jack shaft collars(9414T13): http://www.mcmaster.com/#shaft-collars/=hg57nw
jack shaft(1497K954): http://www.mcmaster.com/#rotary-shafts/=hg589e
keys (get the oversized 3/16" ones): http://www.mcmaster.com/#machine-keys/=hg58nb
 
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