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Author Topic: Suzuki GR650 Scrambler/Tracker - The Strangler!  (Read 20820 times)

Offline Joe Suzuki

  • Posts: 120
    • Everything is Better With Knobbies!
Re: Suzuki GR650 Scrambler/Tracker - The Strangler!
« Reply #10 on: Oct 21, 2013, 17:38:21 »
Not yet, sir. The project has been stalled as of late, what with baby stuff, house breakage, kids' hockey...other various excuses.
I wasn't able to find an easily accessible port (best to put a cooler on the return side, as opposed to the pressure side) to run in from, I think it's going to wait either until I have to do a tear down of the engine or I can get my hands on a spare to rebuild for future use. Main goal for now is to get it running again
Ok, well something to look at down the road.  I'm not sure how necessary it will be.  With a head temp sensor installed as part of my EFI project, I may be able to display that temp on the dash and determine if it'll be needed when sitting in summer traffic.

Offline Cookie

  • Posts: 594
  • God help the child who grows out of everything
Re: Suzuki GR650 Scrambler/Tracker - The Strangler!
« Reply #11 on: Oct 22, 2013, 08:06:16 »
I really dig your concept art sir. nicely done! And that right there is the main reason I could never be an engineer. My drawing abilities are limited to stick figures and puffy Simpsons-type clouds.

I think that scrambler idea needs high pipe(s) though. Check out Pablo83's build, similar ideas are used.
* Insert something witty here *

81 CB750C
84 Tempter - well, most of it...

Offline Joe Suzuki

  • Posts: 120
    • Everything is Better With Knobbies!
Re: Suzuki GR650 Scrambler/Tracker - The Strangler!
« Reply #12 on: Oct 22, 2013, 11:33:26 »
You'd be surprised how many engineers can't draw! :o I agree, high pipes are definitely what I want, but I couldn't photo chop out the old ones, so for clarity, I left the low pipes in.  I'll work on that some more maybe, perhaps I can go really old school and use some white out!

Offline Big Rich

  • DTT SUPPORTER
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  • Posts: 9970
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Re: Suzuki GR650 Scrambler/Tracker - The Strangler!
« Reply #13 on: Oct 22, 2013, 12:17:31 »
Signed up, but I'll be back for more later.

In the meantime, do a Google image search for "GR650 tracker". The first one is a yellow GR with right side high pipes

Great start Joe. .

Offline Joe Suzuki

  • Posts: 120
    • Everything is Better With Knobbies!
Re: Suzuki GR650 Scrambler/Tracker - The Strangler!
« Reply #14 on: Oct 22, 2013, 13:24:03 »
Thanks Big Rich!  I think I've seen every custom GR out there at this point (since there aren't very many).  I think something like this, only two pipes is the look I'm after.



So, here's another one with a bit more photo chop and sketch.



I like the look of straight pipes, I think reverse cones aren't where I want to be.  We shall see.

Offline D4N63R

  • Posts: 325
Re: Suzuki GR650 Scrambler/Tracker - The Strangler!
« Reply #15 on: Dec 19, 2013, 13:07:06 »
In for EFI updates... Ive done a lot with megasquirt in turbo VW's and have long thought of doing what you are here, throttle bodies from a liter bike into a custom manifold on stand alone.. need dyno access for tuning though, would be kinda tough to tune a bike on the street, without crashing anyway hahaha

I think the worst part of the whole deal would be getting a crank trigger setup and a dang fuel pump modded into a vintage looking tank.
« Last Edit: Dec 19, 2013, 13:10:12 by D4N63R »

Offline Joe Suzuki

  • Posts: 120
    • Everything is Better With Knobbies!
Re: Suzuki GR650 Scrambler/Tracker - The Strangler!
« Reply #16 on: Dec 19, 2013, 14:04:47 »
Haven't done much on the bike yet, but I have done a ton of planning and purchasing on ebay. I'm using an external fuel pump from a Honda TRX700.  Looks like this:



Its about the size of a sour cream container, so I have to find a place for that.  My bike won't exactly have the "see through the middle" look!

So here's what I have acquired so far for the EFI conversion:
Ninja 650 throttle bodies + injectors
Ninja 650 throttle cables (push/pull)
Ninja 650 wire harness
TRX700 fuel pump
New Stator from Electrosport
Solid state Rect/reg from 2007 Yamaha R1 (50 amp)

I've also got two rear wheels from a KLR 250 for a rim conversion to 17" front and back.  Need to get spokes on order from Buchanons and get rims/hubs powdered before I can assemble.

Still need a couple of sensors (head temp sensor, IAT sensor, MAP sensor, Ox Sensor), the Microsquirt, and the intake adapter.  I'll be working on the design of the adapter in the coming weeks.  But I sold by BMW dual sport which freed up some $$$, so more purchases will happen quickly after the holidays.

Offline D4N63R

  • Posts: 325
Re: Suzuki GR650 Scrambler/Tracker - The Strangler!
« Reply #17 on: Dec 19, 2013, 15:37:49 »
have you compared that to the size of a good old stock inline pump from a car? pics make it hard to tell but most in line pumps for cars are shorter then a pop can and about half the diameter.

Offline tort

  • Posts: 103
Re: Suzuki GR650 Scrambler/Tracker - The Strangler!
« Reply #18 on: Dec 19, 2013, 16:06:08 »
Great project! Not only does it look good according to my taste, it's exciting EFI wise too! A few comments and questions.

1) When using rear rim in the front, check recommended tire width charts for it and see if the recommended tire fits between stock forks. Maybe youve done it but im just sayin... My rear is 2.50 and i think it would never fit to front, 2.10/15 is pretty much max i can do. I could have fitted wider rim if i had wanted to, but since the tyre is even wider than the rim, i couldnt have fitted the right tyre and it would have looked ugly-thin and funny on that wide rim.

Also, it seems like an easy job choosing the tyres but its not  ;D Problem is, different widths, they look different on the rim and you really know only after youve fitted them. Or maybe im the moran here  :D Tyre measurements, the width and height of the wall, make a whole lot of difference about the overall looks and style of the bike, so you must choose wisely, my friend.

2) About battery pack. If size is important, check this (or maybe you have already and its common knowledge in this forum) : I think you can manage with 8 cells but 10 is even better.

3) EFI - id never use it myself but it sure is really exciting technologically. Does it have air flow sensor built in the throttle body already? How smart is this thing? Can you adjust basic settings (2 cyl, ccm etc) and you think it will start and you can customize the maps afterwards?

Cheers!
« Last Edit: Dec 19, 2013, 16:18:49 by tort »

Offline D4N63R

  • Posts: 325
Re: Suzuki GR650 Scrambler/Tracker - The Strangler!
« Reply #19 on: Dec 19, 2013, 16:18:52 »
im building my own A123 pack as well but I only need a 4cell

with microsquirt you can adjust every setting in the map there are also a ton of base maps to choose from to help you get it running initially.. Its a lot easier then most people think just takes a lot of hours reading hahaha