maxwin

@nokturnalNot had any problems so far. Here was a lap at Cadwell last June.

Been a bit busy with work lately so I've neglected my OSS thread Had a slow start to the season, marred by jetting problems. I've finally got the jetting done and will test it out at the classic track day at Cadwell on Sunday. I'll do a more detailed update of the bits I've done later, but here is a pic of where it's at now.

@downtheshedsorry missed your comment, I don't sell vinyls I'm afraid. @Swiss Toniyour too king Had a good day on Sunday sticking and painting, still a bit to do on the tail but getting there. I'm a bit annoyed that the tank stripes don't line up with the from fairing lines, I get a headache in my eye every time I look at it, once the rest is finished I will probably redo the tank stripes Next job is mucking out the garage

Yes matey, all received thanks!

Brands has been cancelled this weekend due to snow which is just as well as I'm still not ready But I have not wasted the opportunity to spend the weekend in the garage! Bit of checker plate for the seat unit and a bodged catch tank at the back. I will be making a new aluminium battery bay with an incorporated catch tank soon SRAD wheel is a tight squeeze, needed to lose 25mm off the overall width and with the big fat brake hanger I thought this will be easy... WRONG! most of the meat had to be removed from the sprocket carrier to keep the wheel on the centre line 20mm I seem to remember. SRAD front wheel was much easier to do, just fabbed up 2 spacers. Adaptor plates for the SRAD calipers were a bit more involved than I had anticipated, still I pleased with the result Stick coils ahoy! Temperature sensor tapped into the oil cooler flow banjo bolt. Bit of authenticity, secondhand from Grumpy And the bling fairy stopped by in the form of my star sponsor aka Dad Looking to be racing at Mallory on the 8th of April, so plenty of time... WRONG!

I have an alternator I bought loose, it has 2 wired with spade connectors, from what I can tell they are both positive and the negative goes through the engine, can i connect both of these to the battery positive terminal? I'm only running the starter motor and the ignition, everything else has been stripped out.

Haha, an hour in the ultrasonic cleaner and a new seal... racing on a budget

Been stacked lately with work and had a few set backs but here's a few pics of the progress so far, supposed to be racing at Brands on Saturday so need to get my skates on Proper update to follow...

I've had the snapped throttle cable before and a re-snap after soldering, I always use some self cleaning plumbers flux for soldering them on now

Had an industrious Sunday, while stuck indoors watching the child I managed to get all the vinyls cut and backed ready for the fairing (when it arrives) Going for a variation on this one Fairings are coming in black so a bit of red paint, the vinyls and happy days. Still some room for a few OSS decals if there's any going

One of my least favourite jobs, putting the spring retainers on... But soldiered and not the head is one and torqued up. Time to dial in the cams, I've made a couple of tools to use as a piston stop and a secure holder for the degree wheel... The degree wheel is paper an card, I used Autocad to draw and print it. With it all set up I have worked out that the duration is taken at 6 thou lift on these standard cams, also calculated the intake cam is 4 degrees out (advanced) and the exhaust is 2.5 degrees out (advanced) so next job is to slot the cam pulleys.

You have the black round ones I guess, less float height means more fuel in the float chamber. I like to set them up on a bench and measure what fuel comes out of each and adjust accordingly

I would be more worried about stress cracks, but I assume there is a fair amount of redundancy built into these old bikes.

It wouldn't be a mod I would do for the road, but for a race bike its probably worth the risk for a bit more rigidity.

18mm Float heights? I have the brown squarish floats and I thought the float height was 14-15mm.

Update! As I'm not bracing this bike and there is a bit of interest in the frame bracing I will start a new thread in the oil cooled section. Pistons loaded in and crank on. Crank halves back together and torqued up. Head is ready to go back together, nice new Viton stem seals fitted One carb was dull after the ultrasonic bath, probably could have done with a soda blasting I'm guessing. No time at the moment though to mess about, must push on! Damned accelerator pump rubber boot degraded, had to buy two from Suzuki... 25 quid!! delivered that is I removed the carb fronts to clean them and while i was at it decided to try and eliminate a bit of the slide play. I installed some Teflon tape to the main body surface (pictured), it has removed most of the play and has a silky smooth operation. I will keep a close eye on it as I test the bike just to make sure it stays in place. More to come.

I'm using 600 SRAD ones on mine and am sure they sit lower than that.

As promised here is my new build thread, I will be updating the other one with my dad's antics as the year progresses. Usually these threads start with a picture of a ropey bike that is to undergo a great transformation, I however don't have a bike, just a garage full of parts. Thanks to @dupersuncfor the frame and tank, and a useful box of bits The rest of the bits came from fleabay and a doner SRAD. I started the build a few weeks ago when I could spare the time, first up was to rebuild one of the motors I had purchased for a mere £250. Only catch was 4 broken exhaust studs, these proved to be a real PITA. I managed to Tig 3 of them out but the 4th needed some extra attention... With the motor stripped down I was pleasantly surprised with the condition, all tolerances were well within limits and the general wear was very little This time around I've decided to go a little deeper on the rebuild and balance the pistons and con rod, and like usual by the time i realised it was a bigger job than I had imagined I was already too deep! Piston assemblies 2 and 3 were 3 grams each heavier than 1 and 4, that's 6 grams out of balance which at 11,000rpm would definitely be noticeable. Con rod weighing jig took a good day to construct, started out with a simple setup but just couldn't get repeatability, the above works very well Removed the excess weight from the seam that runs around the rod with a sander. Decided to take the excess piston weight from the area that has been machined at the factory behind the skirts, that swarf is from the con rod jig not the piston Pistons all balanced up to within 0.1g. Also had my dad do his lapping duties on the valves . The valve guides look golden so may be APE bronze ones which would be a bonus! I'm pretty much ready to start putting it back together now, just need more hours in the day! I managed to get a few extra jobs in while looking after my 18 month old boy, Mrs aint happy lol Frame Bracing I had originally decided to brace the frame but have scraped that idea for now as one of the clubs I'm running with don't allow it on ally framed machines, however I did put in a bit of time designing an efficient bracing profile which I'll leave here. The 2 cross braces would need to be designed to account for the fuel tank and the exhausts, the front engine mounts need beefing up and the rubber mounts would be need replacing with tight fitting polyurethane. The large plate attaches the head intakes to the top of the frame which makes a huge difference to the rigidity. Over all this is just over 4 times more rigid than stock, the Yoshimura style bracing is only about 1.6 times over standard. Obviously its 3D model and some big assumptions have been made so take it with a big pinch salt Below is the standard frame, deformation is exaggerated. You can see that the weak link is the front frame loops More to come!

Hi all, currently building an engine for this years racing antics and have a couple of slabbie cam questions... The cams and all associated parts are stock and within service manual limits, the only exception is slotted cam pulleys. In the manual what lift is the cam timing measured at? I've assumed its the SAE 0.006" but would like a confirmation. Secondly, does anyone have experience with increasing the valve overlap, as I'm only using 6,000 rpm and above I thought a couple of degrees could give me a few extra hp's at the top end. Thanks in advance

Not that it will help with the broken tube but I recently came across an insert by Hairy RS for £25 that fits all standard Suzuki throttles and turns them in 1/5th turn.

Well turns out I'm not quitting the OSS scene quite yet, I'll continue this thread as my dad will be giving racing a go on the ET. Being about 5 inches taller than me and a lot less flexible the bikes geometry is going to require some 'alterations', and I'd like to continue with the upgrades I had planned. @nlovien I'm always in the market for new techniques to make these bendy frames less bendy so I'll give this a go! I'll be starting a new thread at some point on a new race build of a GSXR 750 Slabside, which I don't have yet so if anyone knows of a cheap one let me know. A frame and or an engine would do for now just to get started, fleabay seems devoid of them at the moment

I made the 750 rear sets from ally stock, the SRAD ones are Harris that came with it.

As some may have guessed the reason for my late reply is that Cadwell did not go so well Started off badly with starting problems on the GSX which made me miss qualifying, putting me at the back of the grid. Would have started 7th on the grid Sunday morning if I had made it... Unfortunately, the pre injection class organise grids on championship points which as I was new started me at... wait for it... the back of the effing grid! we shared a grid with road stocks (basically new 1000cc bikes) which was a pain at the back as they were really fast in a straight line but piss slow in the bends. The SRAD was nice on the handling but seemed a bit lacking at the top end. Things took a turn for the worse when I tried out braking a road stocker who totally closed the door on me, had the choose between punting him off or try to fall in behind, chose the latter and washed out on the brakes... Broken collar bone and 3 broken ribs Needless to say my season has ended, bones are pretty much healed but I don't want to risk re-braking anything. Decided to sell the GSX and the SRAD and going to buy a 1999 R6 for next year and do the pre injection class from the beginning. So as I will soon be Suzuki-less I guess it's goodbye...

LOL yes its a 600, I do have a 750 too but there are more options for the 600 in the pre injection class across the clubs I race with. Looking to do the Thundersport Golden Era Superbikes on the 750 next year.

I guess you do need to have some sort of malfunction to be a racer, the first thing I could think about after the last crash was when will I be out on track again! I agree with what you wrote @KATANAMANGLER, if you want to improve you need to push the envelope and ultimately it pushes back. But enough of that morbid nonsense, back to RACING!!! Donington write up... Unfortunately got off to a bad start, miss calculated how much fuel to put in for practise and so ran out before I even started a hot lap. Started well back on the grid at 26th for race 1, I was still trying to get comfortable on the bike again after the Oulton shenanigans, did a bit of grass tracking at Redgate and finished in 20th overall Race 2 was even worse, started 20th and first lap was plagued with crashes culminating in a red flag and an hour wait while it was sorted out. Here is my bit of crash avoidance on the first lap... Race 2 resumed minus a few unfortunate folks and I was not feeling it at all, chugged through and finished 19th. Sunday was a much better day, cob webs blow out and put Saturday well and truly behind me. Started 19th and finished 18th. Race 2 started 18th and finished 16th, had bad look with the tail enders which cost me 2 places and the bike got 1mph slower each lap according to the GPS. Didn't get lapped though like half the field did by the Mahindra Moto 3 bike we shared a grid with. Here is the last race in full Technicolor... With all that out the way roll on Cadwell this weekend... running 2 bikes, the usual and this little devil (it's carbureted btw ) More to come!