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Hi all, we've recently gotten a 1978 GS1000 that we plan on making some sort of sporty bike out of. Our normal day to day work is custom rigid Triumph twins, so this is a bit of a departure to say the least.
Our current thinking is to use the front half of the frame, the (mostly) stock motor, and that's about it. Tank, seat, rear subframe etc will all be fabricated in house, and we'll use sportbike suspension all around since all the cool kids are doing it. Basically something that rides like a sportbike with torque, and isn't a sportbike.
Compared to an average GS this bike should be a flyweight, so we're not overly concerned with tremendous additional horsepower. Beyond a good stock rebuild with some headwork, I'd imagine we'll limit ourselves to carb tuning, velocity stacks and of course a non stock 4-1 exhaust.
My main question is are the stock 26mm carbs adequate for a mild performance engine such as described, or would I realize some easy performance switching to somethign else? Is there another factory application carb that works well (ie 750 katana carbs or something)? We prefer to mix and match parts from models where practical rather than just spending our way to something, if you know what I mean. I've read a gazillion threads here and don't have a good answer, probably becaue there is lot of referring to carbs by nomenclature rather that what they came on...I'm sort of slow that way.
Also, is there anything I need to know about preventative modifications when rebuilding the motor? Switches to external oil line sor anythign like that? I know we need to fix the clutch basket, will study up on that when I get there, but that's really the only thing I've caught up on.
Thanks all for any input, this seems to be a great site with a TON of info!
Our current thinking is to use the front half of the frame, the (mostly) stock motor, and that's about it. Tank, seat, rear subframe etc will all be fabricated in house, and we'll use sportbike suspension all around since all the cool kids are doing it. Basically something that rides like a sportbike with torque, and isn't a sportbike.
Compared to an average GS this bike should be a flyweight, so we're not overly concerned with tremendous additional horsepower. Beyond a good stock rebuild with some headwork, I'd imagine we'll limit ourselves to carb tuning, velocity stacks and of course a non stock 4-1 exhaust.
My main question is are the stock 26mm carbs adequate for a mild performance engine such as described, or would I realize some easy performance switching to somethign else? Is there another factory application carb that works well (ie 750 katana carbs or something)? We prefer to mix and match parts from models where practical rather than just spending our way to something, if you know what I mean. I've read a gazillion threads here and don't have a good answer, probably becaue there is lot of referring to carbs by nomenclature rather that what they came on...I'm sort of slow that way.
Also, is there anything I need to know about preventative modifications when rebuilding the motor? Switches to external oil line sor anythign like that? I know we need to fix the clutch basket, will study up on that when I get there, but that's really the only thing I've caught up on.
Thanks all for any input, this seems to be a great site with a TON of info!
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