GK76 Engine overhaul-What do you recommend?

[rgvsp]

I took a look at the chain and all I'm saying is "no comment" and leave it at that. Sometimes my stupidity astounds me.

I decided to try and save the windscreen that came with the bike. It was seriously discolored so I tried one of those lens restorer kits for car headlights. It was a 4 stage kit (3M) with different grits of sand paper and polish. It gets an A+ for getting rid of the discoloration. As far as optical quality I'd give it a C+.

Not sure if the results show up on the pics:


Before

After

Tomorrow it's on to repairing cracks in the bodywork with Plastex

[Marsbar]

Looks alot better, Just noticed u have a steering dampener on and had a quick skim through post and couldn't see any reference to it, didn't see it at the beginning, might just be me being blind, want to put one on mine.

[rgvsp]

It is just an old one that came on the bike. I cleaned it up and put it back on. There are absolutely no markings on it to identify a brand.

[Marsbar]

Any close-ups of it? to show how its been fixed on, Welded or what ever cheers, really carnt wait to put mine back together, What you think about cone filters rather then standard box?

[rgvsp]

Here you go


I'm the last one you want to ask about an actual real world comparison as I've never even ridden mine or even started it! Someday soon though. Mine was a basket case upon purchase and I've just been working on it so far.

[Andy]

, What you think about cone filters rather then standard box?

I`ve ran with and without airboxes and in my opinion there are for and against for both configurations,without; loads more room for you to work on the carb`s(believe me you will be grateful for this) but the only way to get them right is with a good quality jet-kit and dyno/road time/money. Had all sorts of weird problems at high rpm with individual filters(12thou+),fine on a dyno but air starvation problems on the move/road. All these problems can be jetted out with a mix of different pilots/mains/settings etc but can be very tiresome/annoying at times and i find it is always a compromise with individual filters(good flexibility low down or wicked screaming top-end), Airbox; Easier to set up initially and no turbulance problem`s up top but i find i get more(top-end) from individuals. Far better flexability low down though with the box.

On the road i say Airbox all the way where you need flexability,on the track go the single route and tune/set for top-end where the low rpm is`nt as important.
These are my finding`s and everybody is different so my advice is try both if you have the money if not stick to the airbox and fit a good quality jet/needle kit(factory pro work well but are expensive).....
Regard`s
Andy

[Marsbar]

Thanks for the info, extremely helpful, I do have access to a dyno being at college, but i dont think they will allow me on it all the time, i will be on road more then track as it will be my everyday transport. I will be going with a straight through can most likely, but i know what you mean about setting each carb up with the cones, because im guessing the carb 1 and 4 will have more air then 2 and 3. hmm, so prob best sticking with box, and looking for a better air filter with bigger air hole, (any recommendations?)

I havnt heard of "factory pro" kits, ill have a look into them, the only one i have been able to find is this kit
(http://www.ebay.co.uk/itm/230683910646? ... 578wt_1163)
witch i think will be needed because i will have the 442CC kit, and have tuned head n going through can.

P.S. sorry RGVSP kinda hi-jacked yr thread.

[Andy]

Thanks for the info, extremely helpful, I do have access to a dyno being at college, but i dont think they will allow me on it all the time, i will be on road more then track as it will be my everyday transport. I will be going with a straight through can most likely, but i know what you mean about setting each carb up with the cones, because im guessing the carb 1 and 4 will have more air then 2 and 3. hmm, so prob best sticking with box, and looking for a better air filter with bigger air hole, (any recommendations?)

I havnt heard of "factory pro" kits, ill have a look into them, the only one i have been able to find is this kit
(http://www.ebay.co.uk/itm/230683910646? ... 578wt_1163)
witch i think will be needed because i will have the 442CC kit, and have tuned head n going through can.

P.S. sorry RGVSP kinda hi-jacked yr thread.

Always ran a stock filter in my bike`s but i know K&N used to supply a filter and different sized intakes for the standard airbox(dont know if they are still making them,somebody will know!).
If your mainly on the road then with the big bore/rebuild i would think you will be fine with standard.......
Never really been a fan of K&N stuff my reason being that my R1 made more power with a standard filter as opposed to being "K%N filter charged" as they put it! I`m not saying this is so for all bikes but what cant speak cant lie right?

The needle`s will be the most expensive part as jets/pilots are freely available(use genuine as aftermarket have sometimes got a different crown height/thinner affecting float level),not saying you should`nt use aftermarket just allow for float adjustment and stick to the same brand if you decide on the cheaper route.
Hope this helps mate and good luck,
Andy

[Variablevalves suck]

The K&N is from the standard cone range and not a specific fit.
the link below shows the yoshi air box from the 750
http://www.airtech-streamlining.com/suz ... 5_yosh.htm
Theres a video on youtube of a real nice jap gsxr4 with flatslide carbs, carnt just find it but its got a sheild that runs behind and round the carbs, helps stop the bad air problems. If you look at yoshi race bikes they all ran them in the late 80's.

[rgvsp]

I finally have some updates. The holidays and work have gotten me behind on things. I finally have a complete exhaust system and I post photos in the next day or so. The gas tank is now free of rust and hopefully this weekend I will see if can start it up for the first time.

I told myself I was going to keep this thing as stock as possible but I couldn't resist when this Suzuka style upper came up for auction.





Hopefully I'll have it the next couple of weeks.