Help me figure out what to build.

[Upshotknothole]

Last year my 7/11 was stolen and it’s time to build a new GSXR.

 

I’ve got an 1100 rolling project to pull parts from, it currently has I think an M 1127 engine in it, RS38s, and a yosh full duplex. The 750W swing arm is a left over from when I was riding it as an 11/7 while finishing my 7/11, and for the last decade has mainly been a rolling collection of parts.

  

 

The slabbie is the next one I want to build, it currently has a stock bandit 12 in it, I’ve got a dot head that I could slap on it, as well as a choice of BST38s or the slingshot RS38s. Will probably be using the Yosh I have on my slingshot on it. I’m not even sure if I can fit the BST38s with either head or if I can fit the RS38s with the dot head in that frame. I’m used to slingshots and have never used a bandit motor before, also looking for recommendations on an easy swap to get a braced swing arm in it. It does currently have a mid 2000s GSXR 1K front end on it again. 

 

 

So which combo of parts should I use? I’m used to the lack of bottom end with the RS38s around town, so using them again won’t be a big deal, but I would kinda like to take advantage of all that low end torque.

[Captain Chaos]

4 hours ago, Upshotknothole said:

I would kinda like to take advantage of all that low end torque.

Turbo is the answer. As much low end torque as you want.

And then sell me the Yoshi Duplex.

[Upshotknothole]

12 hours ago, Captain Chaos said:

Turbo is the answer. As much low end torque as you want.

And then sell me the Yoshi Duplex.

Turbo is always the answer, but I want to build an NA bike first. Which engine would be the better one to use for the turbo, 1127 or blandit?

[Gixer1460]

Much of a muchness really - Bandit barrels would be my preference if I was doing another - 80mm bore for 1186cc and use MTC turbo pistons 10:1 CR if low boost but crowns are thick enough to machine down to 8:1 CR for Loadsa boost!

[Upshotknothole]

22 hours ago, Gixer1460 said:

Much of a muchness really - Bandit barrels would be my preference if I was doing another - 80mm bore for 1186cc and use MTC turbo pistons 10:1 CR if low boost but crowns are thick enough to machine down to 8:1 CR for Loadsa boost!

Thanks, the bandit engine is also the fresher of the two, so I’ll plan on using it for the turbo build when the time comes.

[Upshotknothole]

Picked the bike up finally now that it’s a roller. Has a mid to late 00s GSXR front end on it with a Triumph wheel, probably off a 675, but needs spacers made. So far it’s going to also need a tank, a new subframe welded on, seat and tail, and rear sets. I’ve got a Yosh 4-2-1 exhaust from a slingshot that I’ll be sticking on it, and either BST38s or RS38s, still leaning towards the RS38s, and maybe sticking a dot head on it. 

[johnr]

gsxr adventure bike, long forks knobbly tyres, wide bars and a tall seat. who doesnt want to ride something with 9 inches of suspension travel, knobbly tyres and 100+bhp?