'96 GP-205 thread… a new beginning

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'96 GP-205 thread… a new beginning

Postby spiderwebb » Sun Oct 27, 2013 3:37 pm

here is the current plan for the GP:

Shall be getting a engine upgrade:
- RT-205cc early version kit built by Jet200 (Mark H)
- BGM 58x110mm crank
- stock clutch by MBD
- BGM v2 rear shock
- Casa variable ignition kit
- 100/90x10 tires front and back once current one's wear out on BGM rims
- full or semi hydro disk front brake setup via PM tuning once I can fund it

should be good for a lifetime of fun

65+mph cruising speed is good for now
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Re: '96 GP-200 thread… a new beginning

Postby spiderwebb » Thu Feb 20, 2014 6:18 pm

shall have to get a exhaust bracket fabricated by Gearless24 and a timing check by E Dave once she is running and air leak free.

thanks to Gearless for helping me get one engine out of the frame and the other clean one installed...!!

pics to come
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Re: '96 GP-200 thread… a new beginning

Postby spiderwebb » Tue Feb 25, 2014 3:21 pm

thought I would be able to buttoned this up by weds for out meeting but that is a no go due to I need 3 studs for the exhaust flange (down pipe)... I must have used one of them a year ago on the DL since there is just one on the barrel...??

this RT-205cc early version barrel has 4 stud locations that I might as well use for a nice air tight vibration resistant exhaust flange seal.

there is no reason rushing a good thing

I did get the down pipe painted, rewrapped with exhaust wrap and made nice... next up this week is some wrap protective spray and a test fit. By then the studs should be here.

good days
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Re: '96 GP-200 thread… a new beginning

Postby spiderwebb » Fri Mar 07, 2014 7:50 pm

been riding around and all seems swell

shall be messing with the jetting these next few weeks but temps have been way better (cooler) than the last engine... must be the way better port shapes and design.
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Re: '96 GP-200 thread… a new beginning

Postby Grahamcracker » Fri Mar 07, 2014 8:13 pm

Awesome! Glad to hear its going smoothly. I might get my sprint running in time for spring scoot if I'm lucky :(
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Re: '96 GP-200 thread… a new beginning

Postby spiderwebb » Wed Apr 02, 2014 2:50 pm

temps have been great
400 / 1250 F max

yet to have the timing checked / strobed
I set it to where I think is 23 BTDC

jetting is:
- main 128
- JJL needle @ 2nd clip
- 45 idle
- mixture screw is 1 turn out

shall try the next richer needle @ 2nd clip to see if engine likes it
3rd clip w/ the JJM was boggy and wet sounding

happy days

next up is lacking rear brake and glove box latch broke
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Re: '96 GP-200 thread… a new beginning

Postby Tuna Cowboy » Sat Apr 05, 2014 9:10 am

Always something...
Cheers,
Geoff
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Re: '96 GP-200 thread… a new beginning

Postby spiderwebb » Wed Apr 09, 2014 3:44 pm

Tuna Cowboy wrote:Always something...

Always something... fun to do
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Re: '96 GP-200 thread… a new beginning

Postby spiderwebb » Tue Apr 29, 2014 10:10 pm

mid range seems a bit hot = 400 F CHT and EGT is 1250 F
as I open up above 3/4th throttle the CHT drops to 300 or lower and EGT goes to 1000 - 1100

this must mean my main is about right but the needle / needle clip is still set too lean

Shall try the 3rd clip with current needle weds and then the next richer needle
would be nice to have 300 - 350 F CHT be my max no matter the rpm

onward

speedo said 74 mph (110 km) briefly today
8)
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Re: '96 GP-200 thread… a new beginning

Postby spiderwebb » Tue May 06, 2014 4:34 pm

testing this jetting change:

- main 130
- JJH needle @ 2nd clip
- 45 idle
- mixture screw is 1ish turn out

hoping to alway stay below 400 F CHT no matter the rpm or load
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Re: '96 GP-200 thread… a new beginning

Postby spiderwebb » Thu May 08, 2014 2:07 pm

so.....

turns out I was riding around @ 10 BTDC
:shock: :shock:

checked it w/ E Dave and now have it to where it should have been
23 BTDC @ idle letting the ignition curve get it to 15 BTDC @ 8000+ rpm

should have better performance now which make me wonder how much more since I was doing 74mph last week
8) 8)
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Re: '96 GP-200 thread… a new beginning

Postby spiderwebb » Thu May 15, 2014 3:35 pm

testing this week:

- main 122
- JJH needle @ 2nd clip
- 40 idle
- mixture screw is 1 to 2 turns out

my silencer needs rebuild too
"rat a rat a tat tat"
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Re: '96 GP-200 thread… a new beginning

Postby spiderwebb » Thu May 29, 2014 5:56 pm

Thanks to our favorite metal man gearless24 I now have a exhaust flange that is a rectangle and can be used with the RT kit (4 stud exhaust flange)...!!

thanks pal
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Re: '96 GP-200 thread… a new beginning

Postby spiderwebb » Fri Jun 06, 2014 1:07 pm

Piston Ported Boomstick race version...

only issue is that the flange only has 2 stud holes when 4 would have been best (shall fix that by removing flange and remaking it with a larger rectangle plate). An EGT boss shall be welded onto the header pipe...
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Re: '96 GP-200 thread… a new beginning

Postby spiderwebb » Tue Jun 10, 2014 5:54 pm

30mm BGM PWK w/ working power jet is now on the GP
easy swap

the greater air flow might lean things out a little which should be fine I am thinking but then again I have another factor to keep in mind = the power jet that comes into play @ 4/5th throttle.

testing this week:

- main 125
- JJH needle @ 3rd clip
- 40 idle
- mixture screw is 1 turn out

Prepare ship...prepare ship...for LUDICROUS SPEED!!!!
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