• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

GS1327 Bigbore project

  • Thread starter Thread starter Samsonite
  • Start date Start date
Thanks Glen. It really hasn't needed all that much work to get it where it is now. My ES was much cleaner but insides where rough because of the full tank of fuel left in it for 20 years.

Need to tear the engine down to reseal and build transmission sometime.
 
9.24 at 141... I weigh 215 suited up... Been trying to get a buddy that weighs 165 to get the bike into the 8's. Might need a little giggle juice...
Curt
 
Rob,
Yes to the wheelie bar... It does back flips otherwise. and Terry, The originals were Andrews G3's. They are no longer made so I went with a Cam Motion G7 intake and G21 exhaust. Its all that I could put in without shortening the guides...
Curt
 
Pulled the engine for a top end reseal and trans rebuild. Gaskets ordered. Went with a MLS head gasket and .005 base gasket to bump the compression a bit.
 
I guess i have been living a lie!

Previous owner claimed it was a 1327.

Pulled the head and what do i have?

75mm pistons. Shes an 1166. So not only the bike isn't what i had been led to believe but i feel like a complete dumba$$, and Bought $100 in top end gaskets that wont fit!!

Oh well. It is ported, nice new cams, fresh looking bore, etc.

If this 1166 runs this strong a 1327 must be pretty gnarly!

Sorry all. :oops:
 
Samsonite said:
I guess i have been living a lie!

Previous owner claimed it was a 1327.

Pulled the head and what do i have?

75mm pistons. Shes an 1166. So not only the bike isn't what i had been led to believe but i feel like a complete dumba$$, and Bought $100 in top end gaskets that wont fit!!

Oh well. It is ported, nice new cams, fresh looking bore, etc.

If this 1166 runs this strong a 1327 must be pretty gnarly!

Sorry all. :oops:
Click to expand...

And that 1166, will run even better if setup in the sweet spot. I only found that out with the WB02 :)

That would explain why you were running around without a cooler.
 
Cams are marked 12042, 2 97, d30, cwc, ep71, d1, c1

Cams are identical. No markings on ends or under sprockets.

Any ideas?

ALSO, On top of all that i found my cam chain guide was snapped in half. Looked like it had been that way for a while. Do i have to split cases again to change it out? I need one if anyone has got one laying around.
 
Last edited:
Samsonite said:
Cams are marked 12042, 2 97, d30, cwc, ep71, d1, c1

Cams are identical. No markings on ends or under sprockets.

Any ideas?

ALSO, On top of all that i found my cam chain guide was snapped in half. Looked like it had been that way for a while. Do i have to split cases again to change it out? I need one if anyone has got one laying around.
Click to expand...

rear guide = remove cylinder.
VHR cams i have had was marked on the end "VHR 042".
about the valve sizes..there can be no magic if the door is to small.:-\\\
 
blowerbike said:
rear guide = remove cylinder.
VHR cams i have had was marked on the end "VHR 042".
about the valve sizes..there can be no magic if the door is to small.:-\\\
Click to expand...

well maybe "if" it is too small, but that is a purely hypothetical statement.

In specific terms Terry ported this stock 1100E head (27mm intakes) and achieved higher flow rates than my when he ported my 1100E head with 28mm (1150 intake)valves.

http://www.thegsresources.com/_forum/showpost.php?p=1329975&postcount=31

Nick 98.9 cfm at 0.350" lift

http://www.thegsresources.com/_forum/showpost.php?p=999223&postcount=29

Me (approx) 95 cfm at 0.350" lift


There is more flow with a smaller intake valve. Mien doe have higher flow at lower lift, so maybe a bit more torque.
 
Last edited:
in the end it all goes back to what a person wants and the type of riding/where they want the power to be.
i had a 1200 Carpenter engine in a 1150.
31/27 valves and it was flat till 6 grand or more then it lost it's mind.
it was like a 2 stroke...not ideal street manners at all.
it ran a 10.13@139 with stock gearing and wheelbase..a monster to ride.
of course 27mm valves would have never made this kind of power...
 
blowerbike said:
in the end it all goes back to what a person wants and the type of riding/where they want the power to be.
i had a 1200 Carpenter engine in a 1150.
31/27 valves and it was flat till 6 grand or more then it lost it's mind.
it was like a 2 stroke...not ideal street manners at all.
it ran a 10.13@139 with stock gearing and wheelbase..a monster to ride.
of course 27mm valves would have never made this kind of power...
Click to expand...

While, not the same motor, Bill's 1166 with 0.340's and mild ported 28.5 head was also like a light switch as well at 6K RPM. We attributed that to the 110/110 degreeing of the cams.

he has backed on on the timing and it is much better behaved.
 
Samsonite said:
Cams are marked 12042, 2 97, d30, cwc, ep71, d1, c1


Any ideas?

ALSO, On top of all that i found my cam chain guide was snapped in half. Looked like it had been that way for a while. Do i have to split cases again to change it out? I need one if anyone has got one laying around.
Click to expand...

12042 is a V&H part # for the cams. V&H cams were made by Web. You don't have to split the cases to change that cam chain guide. I have the guide & the 1170 head gaskets. I also have a NEW set of flat top, 79mm 1297 Cosworth pistons for sale if you decide you want to go bigger sometime. Call me if you need the parts.
Ray.
 
Ray hooked me up with chain guides and gaskets. Having head milled .020 and she will be back on the street!

Thanks everyone.
 
Got the 1170 back together and running! Cylinders honed, Head milled .020. Runs nice. Have to finish it up and ride it!!
 
blowerbike said:
rear guide = remove cylinder.
VHR cams i have had was marked on the end "VHR 042".
about the valve sizes..there can be no magic if the door is to small.:-\\\
Click to expand...

so where is the 'door'?

Assuming a 1327 with appropriate head mods and correct size carbs what is the limiting factor/component?

Would a V&H exhaust be the door or limiting component in such a motor? Or would the valves/heads always be the choke point in modding a motor?

it seems like 40-42 size carbs would be enough to avoid being a choke point even with a raised rpm operating range.

At some point with raised operating range cams, a 1327 would be limited by even a V&H exhaust rather than a head with bigger valves and porting.

This hypothetical build would be street motor. Perhaps if its not a race motor there is no serious limiting component if the heads are done right and the carbs are sized right...
 
You must log in or register to reply here.

Similar threads

G
1980 GS1000 restomod
2 3 4
Replies
77
Views
14K
kochic
kochic
8
Stock connecting rods with built GS1000 motor?
Replies
9
Views
785
Guest
G
first timer
Yosh build part deux
2 3
Replies
49
Views
6K
gs road racer
G
Back
Top