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My sportbike build- an update....
- Thread starter Yamaha_chop
- Start date
-
- Tags
- build
Tech7
XS650 Junkie
Great job! You apparently have a vision, and have the dedication and know-how to get it done. Inspirational to the rest of us to say the least. Thank you.
Yamaha_chop
Fabricator Extraordinare
Thanks for the support guys!
I've been working on the swingarm, and the sprocket carrier. Hope to have pictures of that stuff up in a couple of days.
I've been working on the swingarm, and the sprocket carrier. Hope to have pictures of that stuff up in a couple of days.
Thanks for the update on this! 
Yamaha_chop
Fabricator Extraordinare
Way down south unfortunately. a little town called Brookings, right on the border of Oregon, California
Yamaha_chop
Fabricator Extraordinare
Absolutely, hopefully I'll make a lot of progress on it this summer.
Did some more work the last few days. Got a couple of things done that I've been putting off for a really long time.
First up, remember these?
Finally finished putting it all together, looks like it's going to work out great!
Also, finally fabbed up the mounting point on the swingarm for the shock:
The hole for the shock is sleeved as well.
Also, finally I got the steering stem and lower tree drilled, so now my front end is attached properly, now I need to get the front axle sorted and this thing will be on its own two wheels!
I got an upper triple awhile back that had the ignition loop welded back onto it. I got it cheap because of this, but I didn't want to use it anyway, so off it came. Some more shaving needed to blend it fully, but it looks about a million times better now.
I also built a stand for my bench grinder and my new bead roller. It's a touch wobbly right now, so I'm going to put some supports for the main pole. I'm really happy with it though.
Finally, not a shot you haven't seen before, but I just like this shot:
Thanks for looking.
Sky
Did some more work the last few days. Got a couple of things done that I've been putting off for a really long time.
First up, remember these?
Finally finished putting it all together, looks like it's going to work out great!
Also, finally fabbed up the mounting point on the swingarm for the shock:
The hole for the shock is sleeved as well.
Also, finally I got the steering stem and lower tree drilled, so now my front end is attached properly, now I need to get the front axle sorted and this thing will be on its own two wheels!
I got an upper triple awhile back that had the ignition loop welded back onto it. I got it cheap because of this, but I didn't want to use it anyway, so off it came. Some more shaving needed to blend it fully, but it looks about a million times better now.
I also built a stand for my bench grinder and my new bead roller. It's a touch wobbly right now, so I'm going to put some supports for the main pole. I'm really happy with it though.
Finally, not a shot you haven't seen before, but I just like this shot:
Thanks for looking.
Sky
Yamaha_chop
Fabricator Extraordinare
Hey guys. Well as someone pointed out on another forum the way I had the lower shock mounted it couldn't travel through it's stroke properly! Bah! I hate it when I do stuff like that, but sometimes it takes another perspective to point stuff out.
Anyway, I redid the lower mounting point, you can see it here:
These ears will be boxed for strength, but I'm out of Argon at the moment. Also, mounting the shock like this is a bit of a bummer because it makes the shock almost entirely upright, we'll see how much that affects it when I ride it. Also in that pic you can see I cut the side tubes back and capped them.
The good thing that came out of this is that I had to redo the upper shock mount. I didn't like what I had going before anyway. I kind of stole the mounting idea from The KTM or Ducati style:
For the tube where the shock itself mounts I took some 7/8" stock and drilled it for the proper bolt size, then inserted it into the 1 1/8" tubing and welded it into place on both sides. Then I slash cut the ends for looks. I've just got a random bolt in it right now, but once the final bolt is in place it'll almost be hidden. I'm pretty happy with the look.
Also, I received my headlight today. For being a knock-off of a plastic part, I'm extremely pleased with this thing. Well worth the money. Also I had this complicated and fancy mounting system I was going to make because I was sure the factory mounting stuff was crap. Anyway, I installed it with the factory stuff, and I love it! It's exactly what I wanted and I'm super pleased with the look. For the price I really couldn't have done any better.
Thanks for looking
Sky
Anyway, I redid the lower mounting point, you can see it here:
These ears will be boxed for strength, but I'm out of Argon at the moment. Also, mounting the shock like this is a bit of a bummer because it makes the shock almost entirely upright, we'll see how much that affects it when I ride it. Also in that pic you can see I cut the side tubes back and capped them.
The good thing that came out of this is that I had to redo the upper shock mount. I didn't like what I had going before anyway. I kind of stole the mounting idea from The KTM or Ducati style:
For the tube where the shock itself mounts I took some 7/8" stock and drilled it for the proper bolt size, then inserted it into the 1 1/8" tubing and welded it into place on both sides. Then I slash cut the ends for looks. I've just got a random bolt in it right now, but once the final bolt is in place it'll almost be hidden. I'm pretty happy with the look.
Also, I received my headlight today. For being a knock-off of a plastic part, I'm extremely pleased with this thing. Well worth the money. Also I had this complicated and fancy mounting system I was going to make because I was sure the factory mounting stuff was crap. Anyway, I installed it with the factory stuff, and I love it! It's exactly what I wanted and I'm super pleased with the look. For the price I really couldn't have done any better.
Thanks for looking
Sky
Thanks for the updates! I see how the first lower shock mounting wouldn't have worked.. the swingarm moving up and down would be trying to twist the lower bolt.
That upper triple tree looks great!
As soon as you get some rubber on those wheels and it'll really start to come together.
That upper triple tree looks great!
As soon as you get some rubber on those wheels and it'll really start to come together.
Yamaha_chop
Fabricator Extraordinare
If you're wondering what I've been doing lately I've switched over to working on the electrical side of things:
Megasquirt engine management
Soldering isn't too hard, reminds me a lot of welding actually. Lots of time and patience is needed though. Here it is all finished up (except for the boost control, I haven't wired that in yet.)
I'm crazy excited about this thing. Seriously, the bike itself is almost secondary to this device. It's going to be a steep learning curve, but I couldn't be more excited to get started! Now I just need to get the bike finished up so I can use it
Megasquirt engine management
Soldering isn't too hard, reminds me a lot of welding actually. Lots of time and patience is needed though. Here it is all finished up (except for the boost control, I haven't wired that in yet.)
I'm crazy excited about this thing. Seriously, the bike itself is almost secondary to this device. It's going to be a steep learning curve, but I couldn't be more excited to get started! Now I just need to get the bike finished up so I can use it
Teebs
King of the Ass-Hats
You are a friggin madman! And I mean that in the best possible way. I really enjoy watching your progress. Feet first all the way.
pyrocentric
XS650 Addict
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Yeah, same here. I've been watching this build for a long time with great interest.
roadcall
XS650 Addict
Really neat looking build! If you dont mind me asking........What are the wheels off of and the front end set up?
I have a Honda 929 that I am thinking about it being a donor bike for the wheels, front end, and was hoping the swing arm, but it measuers out way to much to modify.
I have a Honda 929 that I am thinking about it being a donor bike for the wheels, front end, and was hoping the swing arm, but it measuers out way to much to modify.
Yamaha_chop
Fabricator Extraordinare
Front forks are 2007 GSXR600, and the front wheel is Honda F2, rear wheel is Honda F3 (it's a half inch wider than the f2 rear wheel)
I read some of the earlier posts on this thread.
You said you couldn't find a turbo the right size for a 650. Did you look at the early 80's Yamaha Seca's. some of them were a turbo charged 650. They were 4 cylinder bikes. I don't know much more than that.
On your amount of boost, you might want to start lower and work up. Also keep the boost off until about 4500 rpm.
You may get detonation problems with out reducing your compression ratio. Some engines are set up with around 7.5-1 to run high boost numbers. I might suggest around 8-1 with maybe around 8-10 psi boost.
While I was in the service I helped a friend add a turbo to his Opel GT back in the late 70's. This is some of what I remember from back then. I suppose things have changed since then.
Great build, awesome project.
You said you couldn't find a turbo the right size for a 650. Did you look at the early 80's Yamaha Seca's. some of them were a turbo charged 650. They were 4 cylinder bikes. I don't know much more than that.
On your amount of boost, you might want to start lower and work up. Also keep the boost off until about 4500 rpm.
You may get detonation problems with out reducing your compression ratio. Some engines are set up with around 7.5-1 to run high boost numbers. I might suggest around 8-1 with maybe around 8-10 psi boost.
While I was in the service I helped a friend add a turbo to his Opel GT back in the late 70's. This is some of what I remember from back then. I suppose things have changed since then.
Great build, awesome project.
You are nuts..
BTW.. I picked up one those horizontal bandsaws we were talking about on page one.. It's not from harbor freight but it's the same thing.. It's awesome! made about 20 big cuts with it over the long weekend and love it! I should have bought one a long time ago..
BTW.. I picked up one those horizontal bandsaws we were talking about on page one.. It's not from harbor freight but it's the same thing.. It's awesome! made about 20 big cuts with it over the long weekend and love it! I should have bought one a long time ago..
Yamaha_chop
Fabricator Extraordinare
That's actually what these engines have stock. Thanks for the good words and comments!
Little update:
So my wife is out of town for a week or so, so I've got some time to work in the garage
My list of things I want to accomplish before she comes back:
Finish intake manifold
mount intercooler
Make intercooler piping
So I started working on the intake more last night. I decided not to use the round tubing I had before, instead I went with a box style intake. here's pictures from yesterday and today:
Intake tubes welded on the inside
Outside
Everything is a very tight fit, but it should work great.
Also, I need to weld some tabs on the bottom that connect to the stock upper mount to give it some stability.
My aluminum welding is getting better, It's still kinda globby, but practice makes perfect I guess.
Stayed tuned I should have plenty more updates over the next few days!
thanks
Sky
Teebs
King of the Ass-Hats
Yeah, your welds totally suck... so when you're all finished you can send the bike to me so that you don't have to look at them anymore. Just lookin' out, brother.
curt698
XS650 Addict
I have no knowledge so I'm just asking, that intake box looks pretty heavy duty. Is there a reason for that? Or is the aluminum so light that is just easy to work with something a little thicker?
