TREK 4500/ GEBE w/ GP460 build

DetonatorTuning

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Joined
May 13, 2008
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1,009
well i started assembly today , and being at my day job, trying to hurry, and havin gmy head you know where, the first things i did where wrong bu ti later saved it and made it all work

1st pic, scribe mark to remove material from DDM Dominator pipe. you'll proba bly see 2 things wrong right away, kind of wish i had.

2nd stinger silencer installed in pipe end.

3rd pipe in mockup position, this i swhere i realized what a dope i'd been.

4th pipe bracket bolts in place and new hope for making it work.

5th rear bracket spacers
 

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DetonatorTuning

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6th front bracket spacers

7th tensioner plate/ mount plate w/ handle mod handle full up

8th handle clearance full up
 

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DetonatorTuning

Active Member
Joined
May 13, 2008
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1,009
6th front bracket spacers

7th tensioner plate/ mount plate w/ handle mod handle full up

8th handle clearance full up

9th handle full down

10th handle full down again


11th business end

12th curb side

beyon dthis i testfitted the opright bracket and set the engine on it to be sure the lower portion of the header waqs well away from the tire. it all looks good.

thanks,
steve
 

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DetonatorTuning

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Joined
May 13, 2008
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1,009
I like the bike build so far.

HA, you got in while i was having a senior moment and having to result to quoting my own post to contiue the thread and attachments.

i'll have pics of the bike, wheels/ tires, mounting rack and fuel system in the next couple of days.

thanks,
steve
 

lennyharp

Member
Joined
Apr 17, 2008
Messages
218
Is this a higher performance motor with custom specs or what? it looks great. What are its specs and performance expectations?
 
Joined
Jan 25, 2008
Messages
180
A GP460 (Chung Yang) will knock you on your butt.
4 port, RC style engine, very fast, and revs very high.

Just be sure to use really good oil, and watch the plating.
CY plating can be ok at best.
When they are running right, they kick so much butt.
Did you get the clutch saver springs for it?
It's a worthwhile investment of $15 for a lower clutch engagement,
and less chance of breakage, like stock 460 springs are known to do.
 
S

sawman

Guest
Better buy alot of belts. you will go through them with that beast. GEBE needs to step up to the plate with a tougher belt for us performance hungry people. i had to go to a chain setup... i could tear a belt up in one ride.
 

DetonatorTuning

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May 13, 2008
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1,009
i think all the current questions have been covered so i'll take the comments.

after break in i'll be using Amsoil i think............

i have a set of clutch savers but i installed a set graciously provided by another member that could prove to be the long sought 3000-3500rpm engagers. clutch savers come in at about 6400 which is much better than the 8100 stockers but not really good enough either.

BELTS, this is the real point of opinion and widely varying experiences with the GEBE setup in general. people with much smaller motors have reported low life and the few i've spoken to personally, with this motor, say that if you pedal away from stops, ease in the throttle progressively and NEVER pop it wide open in the midrange that the belt is fine.

if it turns out that i need a chain setup, it will be one of my own design. it's aready in my AutoCad program. like most of my stuff it's not truely orignal, just a novel use of presently available pieces from various sources.

and because you asked directly lenny, i expect to topout around 55+.

yes, i have my nomex suit on guys, flame away !!


steve
 
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