GS1327 Bigbore project

[Samsonite]

Anyone have a sync tool that they are willing to loan out?

Compression is at 120 PSI across the board. Definitely need higher comp pistons. If it runs this strong at 5500ft I'm sure it will really wake it up with higher compression. Are these 1327 pistons essentially hayabusa slugs??

 

[Samsonite]

Picked up a sync tool. Adjusted valves (Most in spec) Found that my green dyna coils were arcing against the frame. Moved them away and it seems to idle better. Also ohmed them out, a little high at 3.7 ohms. But im still having quite an issue. When i turn up the idle screw enough to idle decent ~ 1200 rpm, after a few seconds it will start to slow down, sound choppy and die. Idle seems to hang when throttle is applied. Ive tried the mixture screws from 1/2 turn out to 2.5 and it does idle smoother farther out but will not hold rpm(Dies). If i turn up the idle screw more it just hangs at 2000 RPM. Floats are at 17mm. Mixture screws are not broken off. New intake boots.

Seems like it has an air leak but i dont know what else to check. Going to try a new set of coils. Plugs look a little rich at idle. It runs out very strong and clean.

Its very tough to sync when the idle is this irratic.

Any ideas??

 

[Samsonite]

Im also running an automotive Accel superstock 8mm radia suppression wire. Will that mess with the dyna coils and ignition?

 

[Samsonite]

Well i tried an older but in spec set of dyna coils and it seemed to idle better. Still having an air-leak type issue though. Ill try to trace it down. Anyone know if the vents on the bell side of the RS40's need to be plugged?

 

[GS1150Pilot]

Is anyone responding to your questions? Perhaps in PM?

 

[hotrods316]

hello,
cant believe i missed this thread before, thats an awesome bike!!!!

I cant help with any of your issues, but if the bike was setup for drag it would most likely idle to off idel a little lean, to keep from loading up. then once the full throttle it would wake up, wake up real good. thats how my bike is setup at least 1000 4-1 heADER and rejetted with pods. and i think the auto wires are required for dyna.

I have a question that i hope you can answer. what is that rear slick? size, make, anything. also what size wheel. i would love to find that slick and put it on my bike and do some slick/wheelie bar launchs. thanks so much,

thats the first slick on a snowflake wheel i have seen... sweet!!!!!

matt

 

[Samsonite]

Is anyone responding to your questions? Perhaps in PM?

No i haven't had any responses. It's okay i'm not in a big rush to deal with it.





Matt, ill get you some answers tomorrow. I can tell you that it doesn't hook up at all being 20 yrs old and dry rotted.

 

[Samsonite]

Looking for some GSXR 38mm carbs!!

 

[Samsonite]

Matt here are the specs on the tire.

Avon 18 Inch slick, K043009

I believe it has been out of production for quite a while.




Still having the idle hang issue. Took off my throttle cables and operated the carbs manually. open the slides and close them, idle hangs up, force the slides to idle position and it idles down.

Odd thing is the slides move very freely, it just seems to hang at that first little bit of throttle opening. I cannot see the throttle rod actually move when i force it back to idle. Digging deeper.

 

[Guest]

What is the jetting on the carbs? You never turn the fuel screw out more than 1 turn? The compression seems low even for 9.5 to 1 what are the valves adjusted at? what is the intake port measurement from side to side in mm? Take the rubber intake boot off the get this measurement check this to make sure they are all the same. If you have a set of RS carbs that have the carbon fiber slides they are prone to cracking and breaking which will give the symptoms you are describing.

 

[hotrods316]

samson, thanks for the tire info.Its prolly what a 5.5inch wide slick? I just like that look, been thinking about the new M&H but its only 4" wide, perfect for my ironhead race bike, but might be a touch too small for the gs.

thanks and hope you get the carbs sorted out, the high desert (or mountains, not sure where you are in CO) can definately make tuning more dificult. thats why I am not so sure about bonneville with my bike, the ole ohio flatlands got plenty of good air to rip on. although i am still partial to the thin mountain air of the roaring fork valley.

Peace

Matt

 

[Samsonite]

What is the jetting on the carbs? You never turn the fuel screw out more than 1 turn? The compression seems low even for 9.5 to 1 what are the valves adjusted at? what is the intake port measurement from side to side in mm? Take the rubber intake boot off the get this measurement check this to make sure they are all the same. If you have a set of RS carbs that have the carbon fiber slides they are prone to cracking and breaking which will give the symptoms you are describing.

130 MJ, 17.5 pilot, needle was at mid clip, set it to bottom slot and seems better. Tried Accel pump on and off. I have tried fuel screw at 1/8th to 2.5 out. Seems to be best around 1.5. I adjusted the valves to spec per the suzuki service manual. The carbs have aluminum slides.

I am also at around 6000 ft. Other than the idle the bike revs out great & plugs come out a nice tan color.

When i turn out the idle screw enough, the idle does not hang when revved, but by that point it is too low to idle without dying.

I got it a bit better but now my syncpro is giving me fits. Seems to have taken air into the tubes.

 

[Samsonite]

Sent my carbs to stetracer to try out a set of 38's. My intake ports are stock size so those 40's aren't doing me much good.

Cleaned it up a bit. Found my flywheel was loose also.

 

[Samsonite]

Stetracer set me up some RS38 carbs for trade for my 40's and the bike runs awesome. Found my rotor nut kept coming loose, causing the rattle at idle. Little celebratory burnout.

 

[Rob S.]

Little celebratory burnout.

The 'Good Neighbor' policy?

 

[Samsonite]

Got some good pictures of her. Still no side covers. Need to pick up some supplies to build tabs.

 

[Rob S.]

Let me know how that goes. I've got six side covers, maybe one has good original tabs. Then...

Get thee to a dynamometer.

 

[Samsonite]

Let me know how that goes. I've got six side covers, maybe one has good original tabs. Then...

Get thee to a dynamometer.

I made them on my ES and had great results.


Need to find one But i need a clutch that holds first.

 

[Rob S.]

That's one damn good looking bike. I hope you won't let any of these Nancy boys talk you into putting a baffle in the exhaust.

Any chance of getting a walk around and start up video?


1100EZ stock except for K&Ns and V&H

 

[Samsonite]

Thanks Rob. This one has been a joy for me.

I did end up putting a baffle in but it is still very loud (even by my standards) when opened up past 6000 RPM and those cams come alive. Just screams.

Ill try for a vid.