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UK Drag bike rebuild

Started by dragsmart, September 14, 2013, 04:32:54 AM

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Joe Sull

I just finished re-installing my harness. You could lay a stock harness down the right side of the bike and plug it in for now.
You Keep What you kill

dragsmart

hi Pat, running a Barnett heavy duty clutch, lets see how it copes, Hi Joe, the harness came with the road lump so gonna barstadise it and remove all the unwanted bits, "LESS IS MORE" as we say in the UK,  will post more pics asap

dragsmart

new rear sprockets 51t and 53t


Dads_FJ

umm... and you thought we wouldn't notice this?!

John S.

'84 Yamaha FJ1100
'89 Yamaha FJ1200
'94 Yamaha WR250
'80 BMW R100S/Sidecar
'39 BSA WM20

dragsmart

Nitrous bottle, air shifter is ally cylinder just visible beyond it

Joe Sull



Were on a need to know and we don't need to know, Ok I get it :scratch_one-s_head:
You Keep What you kill

Pat Conlon

Joe, the first post in this thread shows the hairy Hoosier meatball going on the rear.

Me thinks he needs a stronger frame or at least more bracing...
When that rear tire hooks up, it's gonna twist that engine sideways.
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

ribbert

Quote from: Joe Sull on March 27, 2014, 06:46:02 PM



If you tire of building bikes, a career in computer graphics awaits you.
"Tell a wise man something he doesn't know and he'll thank you, tell a fool something he doesn't know and he'll abuse you"

fj johnnie


andyb

Is it just me or do I see dual steering dampers on this thing? 

How come?  Expecting it to be that willing to go into headshake with that much rake?

Otherwise an interesting project.  I'm wondering how many teeth are on that front sprocket, I'm assuming the big rubber is taller than stock a pinch, but that seems to be an awfully big sprocket in the back, I'm concerned that you'll be out of steam by the finish line.  With a relatively stock (just the usual bolt-ons) motor, I found that crossing the traps around 8500 netted quite the gains vs going through with as much rpm as possible.  It's been awhile but I want to say that two teeth off the rear gave me about a tenth, and a noticable MPH bump.

What are you doing for electronics?  Two-step?  I know they work even with a hand clutch for some.  It seems to be begging for a slider, but that brings a fat lump of headaches aboard, like not being able to use the return road without a scooter giving you a push.  With the air shifter, a shift light, and a relay you could go full-auto on the shifts if you're looking for consistency, though you'd probably want to be able to still shift short on the button (just wire it parallel to the light output).

Interesting project, will be fun to see how it comes out.

Joe Sull

Quote from: andyb on March 29, 2014, 10:16:12 AM
Is it just me or do I see dual steering dampers on this thing? 



I know a guy that hit a dog doing sixty. Believe you me, he wished he had dual steering dampeners. :hang1:
You Keep What you kill

dragsmart

clutch done with some degree of mods to avoid fouling offset sprocket, oil filter modded, carbs on, nitrous foggers fitted, k and n filters on, exhaust fitted and remounted, battery fitted, loom started.



Pat Conlon

ooooooh, THAT is gonna be fun....
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

andyoutandabout

Those hands have not been idle
life without a bike is just life

Joe Sull

Looks pretty menacing. You got what looks like a muffler on there. I'm sure theres a good reason;

[] To loud
[] Increase back pressure
[] Track rules
[] Don't want to cause undo attention :biggrin:
[] None of the above
You Keep What you kill