Holy Grail of XS400 Big Bore Pistons

[bentwrench]

Well, also that 115 is quite an achievement.

When you hit the ceiling for HP, next is aero. You could always build a full fibreglass fairing...

 

[xschris]

I must be doing well then I have had both bikes up to 100mph a few times and that was not at red line, but close. It did take a while and if I had more road I think I could have done a bit more. I also have the 16/37 sprockets maybe if you ran 17/35 you could get a lot more top speed out of it. For me that was a lot faster than I want to got on these bikes. It felt like they where floating off the ground even more with my 45lbs lighter than stock bike. My buddy was impressed but he blew by me with his gxsr like I was on a moped

 

[Scorpio1963]

I hope to never find out what feels like going 100mph on xs400I got my bike up close to 70 in about a mile length of road then I had to slam on the brakes.That was scary enough for me.

 

[drewpy]

I regulary ride at 80, especially on the C class roads in blighty. they just beg for me tear arsing around!

 

[Scorpio1963]

It wasnt the speed that scared me it was the fact I ran out of road and slam the brakes.I wish the transmissions on these bikes were spread out more on the gearing.Especialy between 4-5th and 6th.

 

[XS400Cup]

maybe if you ran 17/35 you could get a lot more top speed out of it

It costs too much acceleration and i will not lose any acceleration.

I think for real speed you need other bikes...
These ones:

http://www.youtube.com/watch?annota...&feature=iv&src_vid=Ph0SjLC_lqk&v=LU-ynRoqDEs

 

[xschris]

I love watching those vids but I would never want to go that fast on a bike. I don't think my heart would take it

 

[Scorpio1963]

Auh a clue behind the mystery mans age with the slashing guitar

 

[drewpy]

I have a friend that ride the irish road races.

They see a different world to ours!

 

[bcware]

One time I tested my gsx-r out. I was banging off the rev limiter in 4th gear at 155 mph. Since then I haven't tried again

 

[Scorpio1963]

155mph on 2 wheels is insane,I like living on the edge sometimes but for me to ride a bike that fast,No thanks I`ll have to pass.Now give me race car thats a different story.

 

[ksqrly]

ANy update on the engine?

 

[Greasey Fingers]

Nope. Twas but a pipe dream

 

[ksqrly]

Nope. Twas but a pipe dream

Thats to bad, would have been cool

 

[aaronxs400]

not true...im still here. i am finishing up with machining school. have been trying to get my home shop done as well. I have a lighter crank...will decide what to do after that. Also have a vintage dragbike frame I picked up...its coming together slowly!

 

[aaronxs400]

little sneak peak.

 

[ksqrly]

SO what piston did you decide to use? Did you get a bigger rod?

 

[ksqrly]

That frame is awesome. Will you be able to get headers in there with the double tube frame?

 

[Greasey Fingers]

not true...im still here. i am finishing up with machining school. have been trying to get my home shop done as well. I have a lighter crank...will decide what to do after that. Also have a vintage dragbike frame I picked up...its coming together slowly!

sweet! I was just teasing incidently, is the xs250 cam an option (being lighter) I think you guys were were discussing it earlier? I have one I can sell if anyone wants it just pulled it from a motor im breaking its in great condition.

 

[drewpy]

the xs250 cam is exactly the same as the 400, except Germany who have a power limit so its not as "lumpy"