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Getting doing on my 82gs1100gz chopper

  • Thread starter Thread starter 82gs1100
  • Start date Start date
I have spoked wheels on my 78 and have been considering swapping to the mags. Mine are a 19 up front and 18 in back.
 
i think im going to change my plans.
i think i want a comfortable daily driver bike so im going to keep it stock looking. but will do the motor. mild head work, cams, Dayna 2000, coils, and exhaust. maby pods as long as rain doesn't interferer with them.
im going to paint the motor black with polished covers. custom paint.
 
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i sent this to Paul Gast but was wondering what some of u on this forum think.
to Paul Gast
Hi i have a gs1100gz (shaft drive 8valve) that i am restoring. The bike will look stock but i want to do some thing to the motor. This bike will be driven alot and i want a reliable street bike.
here is a list of what I'm thinking off.
web cams- 110 or 118grind, recommendation?
Dyna 2000 ignition and coils, will be getting
mild head work, depending on price and if worth it
38mm Mikuni rs carbs, if u recommend them over the stock 34mm CV carbs
Vance & Hines 4 into 1 exhaust, will be getting
transmission under cutting, if recommended
pistons over bore, 1166 kit depending on price
pods if they alright in the rain
i want to paint the engine black and do it piece by piece.
engine assembly price
I have all oem gaskets
I have called and stopped in put have missed you both times.
I also work mights so calling in the morning is hard for me that's why I'm emailing this.
I'm wondering about prices to rebuild this motor. This is a shaft drive so I'm not sure how much power it will take.
How much power do you think this motor will make?
i plan to drop this motor off on the 16th. I'm not in a hery to have it done and don't plan on finishing this bike till winter. I have 2 motors. 1 is completely disassembled and 1 has the jugs off of it. Both were running before disassembled. Witch would u rather have?
i need this motor painted black. I can do this my self but will need to pick it up after the machine work is done and befor it is assembled. How much Would you charge to do it if you do it?
I'm thinking of a 1166cc kit but don't know if it would be worth it. i can get 1mm over oem pistons for $71 each.
I'm not Sure if i could go with a 110grind web cam or a 118. i want it to be reliable.
I don't know how much power to expect out of this motor and don't know if it would be worth it to under cut the transmission.
Are pods ok to use if i get caught in the rain?
I have the stock 34mm mikuni cv carbs but was thinking about the 38mm rs carbs.
i am going to use the Dyna 2000 ignition and Vance & Hines 4 into 1 exhaust and would like your recommendations and prices to build a strong reliable motor for my restoration
Thanks
 
droped off my head jugs cam cores at Fast By Gast today.
this is what were doing
web .395 110grind cams
complete head job porting, seats, racing valve job.
bore block to larges pistions i can find. i need to find them.
36mm Mikuni RS carbs
Dyna 2000 ignition and coils
undercut transmission
new studs
if i can find a 1166cc lit he said im looking at 175hp

I need to find some pistons for a 8v. im looking for the biggest i can put in there without resleaving.
dose any 1 know ware i can get some? im not looking for custom made but would like to get some 1166cc or 75mm.
i thought there was some 1 on here that had a 1166gl
 
I dont think so on the 175 hp out of an 8 valve motor. But good luck. Im doing similar mods to my GS1000 motor but am looking towards 100-110 horsies. Even if you could squeeze that much power out of it, I dont know if the shaft drive will hold up. I am rebuilding this GS1000 motor from scratch and Im already in the 2,000-2,500 $$ range.
 
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175hp from the motor not the rear wheel.
this motor was advertised as 98hp stock. is that a lie.
if doing all this is only good for 2 to 10hp they wouldn't even make these parts. and it wouldn't make sense.
I think Paul Gast knows what hes talking about.
any other professional engine builders on here?
How much can you get out of a 8v 1100 motor?
well when i get it dyno tuned ill post the slip
I'm building the motor my self and probably will have around $3000 into it when I'm done the total restoration will still be less then buying a new bike so i don't care.
the head work is $995
the rest of it is this same no matter what configuration u do
 
175HP is not possible out of that motor. Im sorry but its just not built for that kind of stresses, let alone the low pressure oil system would flounder destructively. I can believe MAYBE 120bhp. Besides, 175hp would rip the secondary drive, the shaft, the rear final drive and inner hub gear to SHREDS. THOSE parts, even if the motor was capable of that, ARE NOT going to withstand that type of torque and direct assault. They have a problem at times dealing with the power they have stock.
 
82gs1100 said:
i think im going to change my plans.
i think i want a comfortable daily driver bike so im going to keep it stock looking. but will do the motor. mild head work, cams, Dayna 2000, coils, and exhaust. maby pods as long as rain doesn't interferer with them.
im going to paint the motor black with polished covers. custom paint.
Click to expand...

I'm glad you changed your mind about chopping a complete bike, Especially since you wanted a teardrop tank, and the L already has those tank (and frame) lines.

I do like chopped bikes, just hopefully it was done as a way to get a damaged or project basket case back on the road. I often wish the po of my bike hadn't cut the rear of the frame short, and never finished it, so I could just put it back together stock and easy. But hey it gave me an excuse to build a chopper. I fitted a bobtail fender, but just could not imagine a seat that would make it look right with the long creased G tank. I was also thinking about adopting an L or custom tank, but decided in the end it's meant for a cafe seat.
 
hey, sounds like you're going to end up with a serious gs :)
i'm looking forward to the dyno reading
from what i've read here, the guys who are after power usually use 4v motors and chain final drives but good on you making the most out of the bike you have
 
ok so your all saying that after all I'm doing I'm not going to get anything more out of the motor. 110hp is nothing out of it. in a bike you can feel 12 extra hp but its not enough to do most of this. the stock 16v were 112hp advertised.
is it the transmission on the shaftys that cant handel the power?
is the 16v motor case stronger?
from what iv herd these motors were over engineered and lasted forever.
how much should i expect from adding web 110grind .395" cams?
Paul Gast said i should get a 20% increase just from what hes doing to the head. hes also taking .020 off the head to bring the compression up.
if i can find 1166 or 3mm over pistons i would be adding 68cc that should give me something
I'm adding 36mm Mikuni RS carbs. i should get something from that.
pods and v&H exhaust. should get a little from that.
still i need to find some pistons
dose any 1 know what the biggest noncustom pistons are?
 
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ask rapidray what power figure you can expect from all those mods
i bet his guess figure is going to be damn near to what you end up getting
 
The problem with what you want to do is that it is a SHAFT drive bike. The shaft & gears WON'T handle that kind of power. On an 8 valve 1100 it would take LARGE cams, valves, carbs, porting, RACE GAS & COMPRESSION to get that kind of horsepower. It IS possible but not practical. You are talking about a DRAG motor for the street. Realistically, it would be difficult to get 175 hp unless you had a "happy" dyno or a VERY fragile, high strung motor. To give you an idea what you are looking at, my small tire dragbike is 1395 cc, with a GSXR 750 head. It is 10.75 to 1 compression with 30/26 valves, STOCK GSXR 750 cams, & 40 mm Mikunis. It runs 9.30s & .40s at 141 at Fontana in 90 degree weather. It ran best at Sonoma which is GREAT air at sea level, 9.19 & 9.20s at 145 mph. This is a push button start motor that makes 141.97 hp at the rear wheel at 10,000 rpm. Add 18% to get close to crank hp. That's almost 170 hp but I have LOTS of airflow & too much carburetion right now. I am also 82 mil bore diameter, not 75. I would say 175 IS possible, but again, NOT practical. Ray.
 
thanks rapidray.
how much power can i put on the shaft drive.
i need to tell Paul befor he gives me a detonator for my shaft drive.:eek:
thanks
 
well im going all out
Final build plan

Cams: Web Cams #70-061 .395/.395
Cam Sprockets: APE adjustable
Cam Chain: HD
Cam Chain Tensioner: APE manual
Head: $995 Head Job
Head Gasket: custom for bore
Carbs: Mikuni 34mm RS
Pods: APE for Mikuni RS
Throttle: required push pull
Head Studs: APE
Head Stud Nuts: APE
Main Studs: APE
Block: Maximum safe bore
Pistons: custom JE Pump gas compression
Crank: Welded
Clutch: APE extra plate
Transmission: Undercut
Ignition: Dyna 2000/ coils

iv decided on the paint to
dark candy marbleized blue

ill just be careful starting out with it
its all going to cost almost as much as a new bike but i can do most of the work my self.
i cant find a bike like this
i like the style.
i like the handling.
i don't like that the only new bikes i can get are crotch rockets or Harley wannabes.
iv had a lot of projects iv never finished because everyone said it wasn't worth it. well im tired of giving up. im going to complete this project the way i want to. and nobody's going to tell me why bother.
sure ill be broke till its finished but ill have something that i can say is mine. i built it.
Thanks for all the help you guys. ill try to do the best i can to document what is being done.
I hope there will be a WNY rally in 09 and i hope to be there.
 
Hi all. as to r/wheel a VX800 (or that's what its name is over herein UK) will fit straight in the GS850/1000/1100 swing arm, straight swap. And as for tuning, my GS1000G has a big bore 1148 using Kwak gpz1170 pistons, anderson 405 cams Ape cam sprockets, gas flowed head, welded crank, CR35mm carbs, Harris pipe, HD valve springs, under-bucket shims, HD cam chain, and lots more. Has 121HP at the back wheel and here's a pic.
rhsidenet.jpg
 
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