Tim's XS project - 750cc rephased ported head titanium valve hot cam craziness
- Thread starter Tim
- Start date
JustinLonghorn
No Purple Hearts, No Blue Ribbons
Re: Tim's XS project - ENGINE UPGRADES COMING 
- AUG 2012 SALT FLATS OR BUST
Hell. Yeah.
- AUG 2012 SALT FLATS OR BUSTHell. Yeah.
two-smoker
I reject your reality, and substitute my own!
Re: Tim's XS project - ENGINE UPGRADES COMING - AUG 2012 SALT FLATS OR BUST
Oy, that sounds bloody wicked!
- AUG 2012 SALT FLATS OR BUSTOy, that sounds bloody wicked!
Re: Tim's XS project - ENGINE UPGRADES COMING - AUG 2012 SALT FLATS OR BUST
Also just learned about annealing copper. There are a number of copper washers on the XS engine forming seals where studs go through the engine cases etc. on the underside. I noticed a small oil drip after running the bike at one of these studs.
I didn't anneal the copper washers in advance. As it happens, when you work copper (i.e. stamp it into washers etc.) it hardens a lot. To soften it back up, you need to heat it red-hot and then you can quench it in water or let cool. This realigns the molecular structure and restores the softness.
Likely the heating of the engine will do some of this, and re-torquing the nuts will seal things up. But if not I have more copper washers I can anneal and replace one at a time. Things you learn.
- AUG 2012 SALT FLATS OR BUSTAlso just learned about annealing copper. There are a number of copper washers on the XS engine forming seals where studs go through the engine cases etc. on the underside. I noticed a small oil drip after running the bike at one of these studs.
I didn't anneal the copper washers in advance. As it happens, when you work copper (i.e. stamp it into washers etc.) it hardens a lot. To soften it back up, you need to heat it red-hot and then you can quench it in water or let cool. This realigns the molecular structure and restores the softness.
Likely the heating of the engine will do some of this, and re-torquing the nuts will seal things up. But if not I have more copper washers I can anneal and replace one at a time. Things you learn.
ProSimex
RUN SCREAMING!!!
Re: Tim's XS project - ENGINE UPGRADES COMING - AUG 2012 SALT FLATS OR BUST
Tim, I've watched that video about 5 times now and the dog is starting to look concerned.. Anyways I have some nice cans on my XS that I got from Noel, too quite for me I've decided. I'm sure you know the ones. PM me if you wanna work something out. I'm sure you have dozens of them already neatly lined up and indexed according to decibel rating and flow restrictions anyways ;D
- AUG 2012 SALT FLATS OR BUSTTim, I've watched that video about 5 times now and the dog is starting to look concerned.. Anyways I have some nice cans on my XS that I got from Noel, too quite for me I've decided. I'm sure you know the ones. PM me if you wanna work something out. I'm sure you have dozens of them already neatly lined up and indexed according to decibel rating and flow restrictions anyways ;D
Re: Tim's XS project - ENGINE UPGRADES COMING - AUG 2012 SALT FLATS OR BUST
Actually don't know the ones you mean. Shoot me some pics maybe. Won't know for sure till I get it out on the street. The end result might be longer headers. I cut these short which also eliminated the kick up at the end which I could use for clearance in corners. I was grinding these at the Dragon.
- AUG 2012 SALT FLATS OR BUSTActually don't know the ones you mean. Shoot me some pics maybe. Won't know for sure till I get it out on the street. The end result might be longer headers. I cut these short which also eliminated the kick up at the end which I could use for clearance in corners. I was grinding these at the Dragon.
ProSimex
RUN SCREAMING!!!
Re: Tim's XS project - ENGINE UPGRADES COMING - AUG 2012 SALT FLATS OR BUST
actually forget about it. They are a little pitted here and there and would detract from your bikes overall perfection. They're run of the mill reverse megaphones, all welded and pretty nice. Just went for a ride and they're nice but I lose the exhaust note at about 60-70mph.
- AUG 2012 SALT FLATS OR BUSTactually forget about it. They are a little pitted here and there and would detract from your bikes overall perfection. They're run of the mill reverse megaphones, all welded and pretty nice. Just went for a ride and they're nice but I lose the exhaust note at about 60-70mph.
Re: Tim's XS project - ENGINE UPGRADES COMING - AUG 2012 SALT FLATS OR BUST
I need the reverse - need to lose the exhaust note at 10 mph and get it at 50. Loping home at 2AM in the city is tough with these pipes. I cut the engine a solid block from home and coast to my garage.
- AUG 2012 SALT FLATS OR BUSTI need the reverse - need to lose the exhaust note at 10 mph and get it at 50. Loping home at 2AM in the city is tough with these pipes. I cut the engine a solid block from home and coast to my garage.
Cafe Redneck
Been Around the Block
Re: Tim's XS project - ENGINE UPGRADES COMING - AUG 2012 SALT FLATS OR BUST
As they say down south "that things hittin the ground" sounds great!!!
- AUG 2012 SALT FLATS OR BUSTAs they say down south "that things hittin the ground" sounds great!!!
Re: Tim's XS project - ENGINE UPGRADES COMING - AUG 2012 SALT FLATS OR BUST
Taking it for a spin. Timing good to go, carbs sync'd. Tested compression quickly and got 160 on the right but only got it up to 130 or so on the left. Might have been me and my crappy compression tester. More to look at as things settle in.
- AUG 2012 SALT FLATS OR BUSTTaking it for a spin. Timing good to go, carbs sync'd. Tested compression quickly and got 160 on the right but only got it up to 130 or so on the left. Might have been me and my crappy compression tester. More to look at as things settle in.
my-79-750-k
Therapy is expensive. Riding is cheap. You decide.
Re: Tim's XS project - ENGINE UPGRADES COMING - AUG 2012 SALT FLATS OR BUST
Brass does the same thing Tim. Thin brass spacers, gaskets, washers etc. need to be annealed after you get them in the same fashion you would do copper. Just a little food for thought. Bike looks and sounds great btw!
- AUG 2012 SALT FLATS OR BUSTTim said:
Brass does the same thing Tim. Thin brass spacers, gaskets, washers etc. need to be annealed after you get them in the same fashion you would do copper. Just a little food for thought. Bike looks and sounds great btw!
Re: Tim's XS project - ENGINE UPGRADES COMING - AUG 2012 SALT FLATS OR BUST
Just got back from a quick zip around the area. Hooooooly crap there's a lot of juice in that engine. Smoother than before too, but that will really be played out when I get it up to 60+.
And it's nice to get back and not be coated in oil and look at a clean engine.
Will definitely anneal the brass washers on top too, when I re-torque the head. I have read that you don't need to anneal new washers, but it makes sense that you should and I might as well.
Heading out for a longer run tomorrow. Get out of the city.
- AUG 2012 SALT FLATS OR BUSTJust got back from a quick zip around the area. Hooooooly crap there's a lot of juice in that engine. Smoother than before too, but that will really be played out when I get it up to 60+.
And it's nice to get back and not be coated in oil and look at a clean engine.
Will definitely anneal the brass washers on top too, when I re-torque the head. I have read that you don't need to anneal new washers, but it makes sense that you should and I might as well.
Heading out for a longer run tomorrow. Get out of the city.
