2v 1000 budget cams??

[thebrandonbeezy]

So pretty much anything in the mid 90s at the wheel ill be happy

 

[Chuck78]

Any updates here?
I just unexpectedly picked up a GS1100G engine with a blown up primary. Rest of the engine is in great shape. I took it with a GS1000 bottom end in mind for a roadracer/canyon carver project that was looking to be big bore GS750 powered.
Now I'm looking at using the 1100 cylinders and head on a 78-79 GS1000 bottom. The crank may swap between the 1000g and the 1100g, but does not swap into a chain drive 1000 without major crank work by pros.
The 1100 is 1.2mm longer stroke, so if using pistons and head on a 1000, you would need to mill the head to bump up the compression ratio. You will need to do proper calculations, but I'd guess you would need to mull half the stroke (0.6mm) off of the head approximately. The cylinders are slightly taller, as is the base gasket, & I think with the 1000 chain drive stroke, you need to use the thinner GS1000 base gasket & oil feed o rings (.020" vs .039") & mock up a torqued down cylinder with pistons installed and measure how far down the hole the Pistons are, & then mill approximately .012" or what your calculations are off of the block deck surface.

Cruizin_image on ebay out if Japan sells 1100cc stock type cast piston sets for DIRT CHEAP ($130?) made in Taiwan that members if the Honda SOHC/4 forum rave about (the Honda offerings) & members here have talked about how they are similar quality to stock oem.
Of course you can't run big aftermarket cams still with the stock style 1100 aftermarket pistons, but an 1100g head and cylinders would work well with this. And then a set of 750 cams or Mega cycle .354" lift cams and slotted sprockets.
At minimum here, you will want to upgrade to a heavy duty clutch backing plate and springs, & weld the stock rivets in. A crank job to verify proper indexing (as in not twisted from the brute power), good bearings, & then having the crank reassembled and welded is really a good thing for any gs1000+ even if stock but just ridden hard (hard launches/clutch dumps/hard downshifts).

I'm looking at 1100 top end, head porting, crank welding, backcut trans gears, clutch basket mods, h.d. clutch springs, 1085cc or 1100cc Wiseco pistons, & an old set of Yoshimura .360" lift road race cams. Considering similar on a GS750-920cc (head work/pistons/cams) but the big guns sound more fun and the 1000 engine plus starter and battery weighs same as kickstart-only gs750 tiny battery no starter no starter gears or relay. And if I do truly race this and not just the Formula 500 bike, the 1100 would be more competitive by far, the 750-920/944 would get passed on all the long straights by 1000/1100 modes bikes

 

[thebrandonbeezy]

So far all thats been done is the 4 into 1 and a little extra timing. Pods and jetting is next although im on the lookout for some bst34ss carbs from 89 to 92 katana 1100. The cams and slotted sprockets will happen in the next few months. As for big bore and and head swap thats to be determined. I have 3 other project bikes i need to get back on right now i need a new top end on my titan 500 and my tc185 needs a new generator and my fzr1000 needs a trans.. altho im probably going to swap the t500 engine into the tc frame since the titan frame is about beyond salvageable

 

[Chuck78]

K&N makes nice real nice dual oval lunchbox filters for the BST33/34 carbs. I picked up a set with some 90's Katana 600 bst33's that I intended to use on a 673cc GS550 project but now it's looking like vm28's will grace the now 740cc GS550's... I'd offer them to you but the air jets and needle jets are probably all wrong for a bike that size.

If going 1100 top end (1055cc with stock 1100 pistons on a 1000 crank) or bigger big bore, BST36's would even be a good candidate for the larger big bores

 

[thebrandonbeezy]

I have a set of bst38s that i got for free. Missing all the jets and the floats. But the rest is there and in good condition at that. Too much carb for my 8v even if i went 1100cc or bigger i presume. May come off them soon

 

[thebrandonbeezy]

But like I said im not sure if im going to go big bore at the moment anymore. I need to get my other bikes done... SO MANY BIKES hahaha

 

[thebrandonbeezy]

Would you happen to have the p/n for those filters?

 

[limeex2]

How about a 1000 bottom end, 1100G piston, cylinders, 750 cams?

 

[Chuck78]

That's a great budget combo there ^^^
Either need to bore the 1100G pistons into the 1000 block (+2.0mm o.s.) or run the 1100 block but need to run the 1000 base gasket and deck the block about .020"-.039" approximately to make up for the stroke difference and bring compression ratio and quench height back to where it should be. The 750 cams will help with high end hp slightly, & can be had very cheap on eBay.

those k&n's for the 1990's Katana 600's bst34's had a part number starting with RU-####. Not sure they'd fit 38's though.

 

[thebrandonbeezy]

That's a great budget combo there ^^^
Either need to bore the 1100G pistons into the 1000 block (+2.0mm o.s.) or run the 1100 block but need to run the 1000 base gasket and deck the block about .020"-.039" approximately to make up for the stroke difference and bring compression ratio and quench height back to where it should be. The 750 cams will help with high end hp slightly, & can be had very cheap on eBay.

those k&n's for the 1990's Katana 600's bst34's had a part number starting with RU-####. Not sure they'd fit 38's though.

Thats actually kinda the exact setup id do if i went big bore.. it would be cheap fast and reliable. As for the bst38sss carbs i have, probably going to save them for something with more valves. At this point id like to find a set of bst33 or 34s. I tried to buy a 92 kat1100 the other day just for the carbs (bent frame no title but ran) but the guy backed out last minute. And go figure my 97 kat 600 is missing the carbs go figure haha

 

[thebrandonbeezy]

http://katriders.com/wiki/index.php?title=Carburetor_Settings_and_Specifications
Also check out this link really good info right there. Think we need to do something like that with gs carbs

 

[one_civic]

We're lucky up north, we got the vm29ss flatslides that came on the 85-87 gsxr750, their pretty much a direct bolt on to later model 8v gs's with cv carbs bigger intake boots, I got 2 sets for less than $200 can. here's what they look like, their actually 29's not 33's

http://www.ebay.ie/itm/MIKUNI-TM33-...443999?hash=item58e6de33df:g:UuEAAOSwcLxYE6XT

and you can use these carbs too as parts for the vm29ss, to get rid of the accelerator pump and have quick access float bowl main jet changes as well as the 33mm face plates

http://www.ebay.ie/itm/391394028109?_trksid=p2055119.m1438.l2649&ssPageName=STRK:MEBIDX:IT

for gaskets, use ones from a suzuki DR 350 with the TM33 pumper

 

[thebrandonbeezy]

Wait why would you get rid of the pump?

 

[one_civic]

no reason really,
like them, some others don't, all depends who you talk to

 

[Chuck78]

Thats actually kinda the exact setup id do if i went big bore.. it would be cheap fast and reliable. As for the bst38sss carbs i have, probably going to save them for something with more valves. At this point id like to find a set of bst33 or 34s. I tried to buy a 92 kat1100 the other day just for the carbs (bent frame no title but ran) but the guy backed out last minute. And go figure my 97 kat 600 is missing the carbs go figure haha

If you want some BST33's & K&N dual oval lunchbox filters, I have no use for these now since I have discovered Kawasaki VM28's and Mikuni VM29 smooth bores will be a direct fit to the GS650 head with GS400 intake spacers...

They are off a Katana 600, & I think the needles may need some tuning on an 1100 but may be good on a 1000 as they come off of a higher revving 600.

I am out of town but will be back Monday and can snap some photos. They were 91-96/7/8-ish 600 Katana carbs. 88/89 had bst31 (or 89/90) then bst33 until the late 90's then swapped to a different model. Let me know if these interest you. PM/email me if interested. Good luck either way you go.

FYI those "VM29SS" are not VM's but rather the dirt bike carbs mentioned with a nostalgic name. They are larger bore but have a throat restrictor bolted on to the front, and people bore them out to full size typically.
They do typically suffer from slide wear or body wear in slide area if I recall correctly, & some told me that most used examples are generally pretty worn and the parts are not available to take up the slop. They are great if you find a good set but are very hard to find in the US. Canada only.

 

[thebrandonbeezy]

If you want some BST33's & K&N dual oval lunchbox filters, I have no use for these now since I have discovered Kawasaki VM28's and Mikuni VM29 smooth bores will be a direct fit to the GS650 head with GS400 intake spacers...

They are off a Katana 600, & I think the needles may need some tuning on an 1100 but may be good on a 1000 as they come off of a higher revving 600.

I am out of town but will be back Monday and can snap some photos. They were 91-96/7/8-ish 600 Katana carbs. 88/89 had bst31 (or 89/90) then bst33 until the late 90's then swapped to a different model. Let me know if these interest you. PM/email me if interested. Good luck either way you go.

Ill definitely be interested, will pm you on that tomorrow. Just a question though. What carb boots would i need to run and is the spacing going to be right for the 1000 with cv carb boots?

 

[850 Combat]

Probably that with the d port 1100 head pods jet kit and 4 to 1 is my plan for this year

I have the whole 1100 D port motor in one of my 1000Gs. Its noticeably stronger than the others. I didn't know until I had to change the starter clutch after 5 or 6 rears of ownership. Bigger diameter crank and different starter clutch.

 

[GregT]

I put a set in my Gs1000, I degreed them at 106. The top end was crisper and seemed to pull better. Would I do it again? Yep, Jerry

It's not which stock cams you use - it's where you degree them.
Put stock GS1000 cams on 107/109 lobe centers and be surprised...

On stock timings there's very little difference 750 to 1000 cams, just dial in the stock 1000 cams and save the money.

 

[thebrandonbeezy]

It's not which stock cams you use - it's where you degree them.
Put stock GS1000 cams on 107/109 lobe centers and be surprised...

On stock timings there's very little difference 750 to 1000 cams, just dial in the stock 1000 cams and save the money.

Whats stock ?

 

[GregT]

Whats stock ?

Varies a bit but usually around 110/110 - in the 1000.