Author Topic: Suzuki GSXR750 1985  (Read 17596 times)

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Offline Sfbrain

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Suzuki GSXR750 1985
« on: April 04, 2017, 07:51:45 PM »
As requested here is the Gixxer thread  8)

I will post a couple of posts to bring you all up to date.

I've just surprised myself to find that i bought this bike almost 7 years ago !!  :o

This is how she arrived ...



A Japanese import (UK bikes didnt have fuel gauge), mainly original apart from paint job, nexus exhaust sytem and a few 'extras'



First thing i did was start collecting original parts (the exhaust shield covered in small holes, is unique to the 1985 model).



My plan is to restore her to UK spec (different loom, side stand switch, different clocks), want her to eventually look like this  8)



Another update post after i've had my dinner  ;D

 ;)
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Offline Motty

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Suzuki GSXR750 1985
« Reply #1 on: April 04, 2017, 08:21:31 PM »
Great news another Rebuild Thread  :D  :D  :D  :D 
{settles down in comfy chair}
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Offline Sfbrain

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Re: Suzuki GSXR750 1985
« Reply #2 on: April 04, 2017, 08:27:50 PM »
Update post 2  8)

I'll start with a little bit of History regarding Gixxers

1985 saw the intoduction of the GSXR series with the GSXR750F (my one), this was the only model introduced at the time.

1986 saw the introduction of the GSXR1100 with the 'G' model and an updated 750G  8)

Sounds good, but the update to the 750 in 86 involved quite a few changes.

The whole front fairing (top, middle and belly) was changed, making the 85 models fairing unique to that year (and making them very rare  :-[ )

The 86 swing arm was also about 30mm longer than the 85, again making the swing arm, brake torque arm etc unique to the 750 85 too  :-[

Thereafter, the 750 and 1100 shared almost all parts, so the 1985 750 is unique in many ways from all subsequent 'slabside' Gixxers. It is also the very first Gixxer  :)

With the fairing pannels hard to come by, i started collecting them, as the ones on the bike were 'damaged'



Once i had a decent set, i sent them off to TC for paint .......









All this lovely paint work is currently wrapped up nice and warm in my attic  :P

I did some stripping down a couple of years ago, and got it to this ....



Then i did several Yam restos that you have seen (well some of them), after i had finnished the 2 x 350B's i promised myself i would get back to the Gixxer.

 ;)
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Offline Sfbrain

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Re: Suzuki GSXR750 1985
« Reply #3 on: April 04, 2017, 08:58:35 PM »
For completeness, here are the pics i posted in 'Piston Broke'  8)

She went back on the bench



Major issues with the aftermarket exhaust system meant i actually cut it off the engine, which also means i have to get some stud removel work done on the head when its off the engine.  :-[

With the exhaust off and a few other bits off, i only had one thing still to remove before taking the engine out of the frame ......... the front sprocket. When i mentioned this on a.n.other forum, they all fell about laughing.
Apparently these are a major issue with this engine  :-\

To keep this short, i tried to remove the sprocket retention nut with my socket set, the chain still on and the rear wheel locked in place by threading some timber through the spokes ..................... NO LUCK.

Next, with advice from a Gixxer forum, i tried a 'Windy Gun' ..........................NO LUCK

Then i heated it up with a blow lamp and again hit it with the 'Windy Gun' ............ NO LUCK

Then my mate 'Rattle; brought a 6 foot steel tube  :o  which we put on the T-Bar and 32mm socket and went for it with 6 foot of leverage  :P :P :P

This is what it did to the T-Bar



Apparently, Suzuki used large quantities of loctite on it and torqued it up to nearly 100 Ft lbs !   :o :o :o

Fearfull of causing damage elsewhere (transmision, wheel spokes, my back !!  :-X  ), i decided to leave the sprocket on and tackle it when the gearbox is out.

So Rattle and i draged her outside and laid her down.



15 mins later the engine was out  :P



Today i completed the chassis strip



Thats up to date guys

More soon

 ;)
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Offline kawazonkey

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Re: Suzuki GSXR750 1985
« Reply #4 on: April 04, 2017, 09:41:34 PM »
Looking forward to this. One question, where on earth did you find an original exhaust? I thought they had all rusted to oblivion years ago!

Offline mervin

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Re: Suzuki GSXR750 1985
« Reply #5 on: April 04, 2017, 09:52:46 PM »
Steve . I had a similar problem with a TDR 250 front sprocket, I ended up drilling a hole through the side of the nut (as large as possible ) then split it off with a cold chisel
Motorcycling is not, of itself, inherently dangerous. It is, however, extremely unforgiving of inattention, ignorance, incompetence, or stupidity"

Offline Sfbrain

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Re: Suzuki GSXR750 1985
« Reply #6 on: April 05, 2017, 08:14:14 AM »
Looking forward to this. One question, where on earth did you find an original exhaust? I thought they had all rusted to oblivion years ago!

Hi Kawazonkey

I found the exhaust system on ebay at the same time i bought the bike, so about 7 years ago.

If i remember correctly i paid £200 for it, there is one on ebay at the moment for £700+ (which is more than i paid for the bike) :o

 ;)
RD250E (Running)
DT175C (Almost !!)
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GSXR750F (on bench)
CB750K2 '74 (waiting)
CBR900RRN '92 (Running)
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Offline Sfbrain

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Re: Suzuki GSXR750 1985
« Reply #7 on: April 05, 2017, 08:18:07 AM »
Steve . I had a similar problem with a TDR 250 front sprocket, I ended up drilling a hole through the side of the nut (as large as possible ) then split it off with a cold chisel

Cheers Merv, yes i was thinking about doing this, or maybe using a 'nut splitter' on it.

Either way, i recon it will be easier to do with the output shaft out of the bike and the sprocket clamped in a vice, more room to work round it.

 ;)
RD250E (Running)
DT175C (Almost !!)
FS1E '74 (Running)
XS750E (Waiting)
GSXR750F (on bench)
CB750K2 '74 (waiting)
CBR900RRN '92 (Running)
GS1000S '80 (waiting)
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Offline stukey

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Re: Suzuki GSXR750 1985
« Reply #8 on: April 05, 2017, 08:33:27 AM »
I have a good selection of big hammers and chisels.I also have a kango hammer ,can bring them up saturday :o :o :o
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Offline Sfbrain

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Re: Suzuki GSXR750 1985
« Reply #9 on: April 05, 2017, 02:50:12 PM »
This morning i got my jet blaster out and blasted the frame/swing arm.

Obviously water only shifted the dirt and road grime but its a good start



Over the interveining years i have been buying up bita and pieces for the bike whenever i've seen them available cheap.
This morning i decided to open up all the boxes and remind myself what i had aquired, i was very pleasantly surprised how much good stuff i have.
Loads of NOS, brake lines, cables, switches etc etc, 2 complete locksets, 3 looms, 2 chainguards, rear mudguard, air filter, cam chain etc etc etc

Here it is ......



Then i had a think about what jobs i should prioritize reflecting time needed by external suppliers.

Start with i'm going to strip these as Phillpotts have a leadtime of 6-8 weeks on rechroming



Going to strip the wheels down so i can get them repainted and then start on this ........





I will be getting the engine repainted proffesionally so need to strip it completly before sending out

More soon (ish)

 ;)
RD250E (Running)
DT175C (Almost !!)
FS1E '74 (Running)
XS750E (Waiting)
GSXR750F (on bench)
CB750K2 '74 (waiting)
CBR900RRN '92 (Running)
GS1000S '80 (waiting)
TRIUMPH TINA '63 (restored)
Honda P50 '68 (Running)
RD350B (Running)
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Offline Sfbrain

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Re: Suzuki GSXR750 1985
« Reply #10 on: April 05, 2017, 04:50:54 PM »
Couldnt resist a quick peek  :D :D :D



 ;)
RD250E (Running)
DT175C (Almost !!)
FS1E '74 (Running)
XS750E (Waiting)
GSXR750F (on bench)
CB750K2 '74 (waiting)
CBR900RRN '92 (Running)
GS1000S '80 (waiting)
TRIUMPH TINA '63 (restored)
Honda P50 '68 (Running)
RD350B (Running)
TDR250 (waiting)
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Offline Chunk

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Re: Suzuki GSXR750 1985
« Reply #11 on: April 05, 2017, 06:55:03 PM »
I will be following this one looks very interesting! I used to have a black GSXR750M, it was a beast to say the least! :D
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Offline Jimbo66

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Re: Suzuki GSXR750 1985
« Reply #12 on: April 06, 2017, 12:47:36 PM »
Looks like it has oil changed and good quality often  ;)
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Offline Jimbo66

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Re: Suzuki GSXR750 1985
« Reply #13 on: April 06, 2017, 12:53:56 PM »
A hammer only sds drill is worth its weight in gold being a sparky👍
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Offline Sfbrain

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Re: Suzuki GSXR750 1985
« Reply #14 on: April 06, 2017, 06:31:08 PM »
Todays update, the day started well and then disaster !!!  prepare yourselves for a shocker !!  :o

First off i stripped the forks so the stanchions can go off to Phillpotts



Then stripped the wheels down so they too can go off to be repainted



Off with the signal generator cover (so i can turn the engine over)



Then on to the cylinder head

Out with the cams



And off with her head !!



And this is when the 'Disaster' revealed itself  :-[ :-[ :-[

Some water had got into cylinder #1  :o :o :o





Bugger, Bugger, Bugger  :'(

At this point i packed up and went for a beer.

Fortunatly the cylinder in question was at the bottom of the bore, so removing the barrel does not involve running the piston over the rusted area.

I'm now retiring to consider my next move  8)

 ;)
RD250E (Running)
DT175C (Almost !!)
FS1E '74 (Running)
XS750E (Waiting)
GSXR750F (on bench)
CB750K2 '74 (waiting)
CBR900RRN '92 (Running)
GS1000S '80 (waiting)
TRIUMPH TINA '63 (restored)
Honda P50 '68 (Running)
RD350B (Running)
TDR250 (waiting)
Club Member 1556