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Author Topic: HollywoodMX's xv920/TR1 Cafe super-dupe!  (Read 108327 times)

Offline HollywoodMX

  • Posts: 775
Re: HollywoodMX's xv920/TR1 Cafe super-dupe!
« Reply #20 on: Nov 12, 2013, 02:10:55 »
Ok I think custom making exhaust is my new most favourite thing to do building a bike. Painting things is number two, sanding things for paint is number ass!

I'm having fun with making the rear pipe which others have complained about. Cutting the frame has definitely made things easier and I am glad I did it. I'm one cut away on the rear to wait on the decision of how I am placing the mufflers. I measured and I can make the rear equal length no problem so that's good fore a few exta ponies.. The rear exhaust is going to be twisty though! Inspiration of making the rear exhaust comes from the yz450f if you are into dirt biking..





TR1 Build thread: http://www.dotheton.com/forum/index.php?topic=54733.0
Xv920 Tracker thread: http://www.dotheton.com/forum/index.php?topic=59754.15

77 KZ1075 Supercharged - 81 Yamaha XV920rh (x2) - 06 YZ250 highly modified - 08 Hyabusa

"I live my life a 1/4 beer at a time"

Offline Cuba Libre

  • Posts: 136
Re: HollywoodMX's xv920/TR1 Cafe super-dupe!
« Reply #21 on: Nov 12, 2013, 10:09:16 »
I'm following this. Looks interesting!

M.

Offline HollywoodMX

  • Posts: 775
Re: Re: HollywoodMX's xv920/TR1 Cafe super-dupe!
« Reply #22 on: Nov 12, 2013, 14:08:15 »
I'm following this. Looks interesting!

M.

Wait till you see what I have mapped out for the lower part of the rear exhaust. Much more radical twists to come!
TR1 Build thread: http://www.dotheton.com/forum/index.php?topic=54733.0
Xv920 Tracker thread: http://www.dotheton.com/forum/index.php?topic=59754.15

77 KZ1075 Supercharged - 81 Yamaha XV920rh (x2) - 06 YZ250 highly modified - 08 Hyabusa

"I live my life a 1/4 beer at a time"

Offline HollywoodMX

  • Posts: 775
Re: HollywoodMX's xv920/TR1 Cafe super-dupe!
« Reply #23 on: Nov 13, 2013, 17:29:27 »
I investigated what would need to happen for the kz wheels to swap in. It's actually fairly easy.

But it has pros and cons.

Pros. I have the wheels and they are in pristine shape. The xv swing arm is considerably wider than the kz so one could fit a 140+ tire easily. The spoked wheels look a lot better. I get a rear disk too vs drum.

Cons. I really don't want to use tubes because I'm trying to save weight in this build as part of the overall goals. I was actually going to weigh the parts for the final difference. Another con is rotational mass. My dirt bike runs a tubeless setup and there is a noticeable acceleration difference. It's more work, I will need to fab up new brake mounts front and back and buy a second rotor for the front, need to make a new front axel and a couple spacers. Then I will need to fab a rear master mount and brake  signal.
TR1 Build thread: http://www.dotheton.com/forum/index.php?topic=54733.0
Xv920 Tracker thread: http://www.dotheton.com/forum/index.php?topic=59754.15

77 KZ1075 Supercharged - 81 Yamaha XV920rh (x2) - 06 YZ250 highly modified - 08 Hyabusa

"I live my life a 1/4 beer at a time"

Offline HollywoodMX

  • Posts: 775
Re: HollywoodMX's xv920/TR1 Cafe super-dupe!
« Reply #24 on: Nov 18, 2013, 16:58:18 »
Sorry there are no new updates this weekend. I got into trouble drinking too much at a all you drink event. It slowed me down from spending the day in the garage.

What I did do is spend the time researching v twin exhaust design. It made my head spin as there are too many opinions and after digesting it all I ended up in the exact same place as my original plan of equal length save an inch on the rear due to the extra bends.

1.75 inches may be a tad too big but once I mod the engine,  head work or xv 1100 jugs the exhaust will be fine.
This coming weekend I have 3 days off so I will get lots done.
TR1 Build thread: http://www.dotheton.com/forum/index.php?topic=54733.0
Xv920 Tracker thread: http://www.dotheton.com/forum/index.php?topic=59754.15

77 KZ1075 Supercharged - 81 Yamaha XV920rh (x2) - 06 YZ250 highly modified - 08 Hyabusa

"I live my life a 1/4 beer at a time"

Online JustinLonghorn

  • DTT SUPPORTER
  • *
  • Posts: 6520
  • No Purple Hearts, No Blue Ribbons
Re: HollywoodMX's xv920/TR1 Cafe super-dupe!
« Reply #25 on: Nov 18, 2013, 18:32:29 »
Yep. I'm in.
I'm going to eat your brains and gain your knowledge.

Into The Sunset, CB750 build

TT500 the Animal

Offline stidds

  • Posts: 174
Re: HollywoodMX's xv920/TR1 Cafe super-dupe!
« Reply #26 on: Nov 18, 2013, 18:36:35 »
Looks great, can't wait to see any updates.

As for the tank, you say it is a super easy fit, any info or pictures on how you have or will install it?  I have one myself for my XV750 and would be interested in your way of mounting it.

Offline rundown

  • Posts: 260
Re: HollywoodMX's xv920/TR1 Cafe super-dupe!
« Reply #27 on: Nov 18, 2013, 23:17:52 »
Not to get too far ahead, but are you planning on using the triangular aluminium pieces for the foot pegs, exhaust mounts & rear brake cyl mount?  I ask becuse they are rather clunky and since you have opened up the rear of the engine so much perhaps you can fab a more elegant solution?

Offline HollywoodMX

  • Posts: 775
Re: Re: HollywoodMX's xv920/TR1 Cafe super-dupe!
« Reply #28 on: Nov 18, 2013, 23:43:56 »
Looks great, can't wait to see any updates.

As for the tank, you say it is a super easy fit, any info or pictures on how you have or will install it?  I have one myself for my XV750 and would be interested in your way of mounting it.

You're gonna love this.. My machinist buddy calls me "zero engineering" because I have less than desirable engineering skills compared to a machinist. For the record zero engineering actually exists in Japan.... Lol.

Custom mount for the top bolt and a door spring to hold the rear. :-)



TR1 Build thread: http://www.dotheton.com/forum/index.php?topic=54733.0
Xv920 Tracker thread: http://www.dotheton.com/forum/index.php?topic=59754.15

77 KZ1075 Supercharged - 81 Yamaha XV920rh (x2) - 06 YZ250 highly modified - 08 Hyabusa

"I live my life a 1/4 beer at a time"

Offline HollywoodMX

  • Posts: 775
Re: HollywoodMX's xv920/TR1 Cafe super-dupe!
« Reply #29 on: Nov 18, 2013, 23:59:58 »
Not to get too far ahead, but are you planning on using the triangular aluminium pieces for the foot pegs, exhaust mounts & rear brake cyl mount?  I ask becuse they are rather clunky and since you have opened up the rear of the engine so much perhaps you can fab a more elegant solution?

I have been thinking about what to do there. Funny thing is I used to hate them but now they are starting to grow on me, especially after removing the black paint. But as I am looking at rear set options my creativity is starting to wander. The problem is they double as you mentioned the mounts for the exhaust hangers and brake but they hold the swing arm so there is a bit more to them than making adaptors for rear sets like on other bikes. It's something that will require deep thought and copious amounts of caffeine to design a replacement.  I was thinking of making something new with frame tubing ala ducati and ktm and I was thinking a easy way out might be to lace them them in carbon fibre.
TR1 Build thread: http://www.dotheton.com/forum/index.php?topic=54733.0
Xv920 Tracker thread: http://www.dotheton.com/forum/index.php?topic=59754.15

77 KZ1075 Supercharged - 81 Yamaha XV920rh (x2) - 06 YZ250 highly modified - 08 Hyabusa

"I live my life a 1/4 beer at a time"