A couple of hybrid questions.

[smemly]

Hi All,

Finally got my 3TJ hybrid built up on its new frame & took if for a quick spin this afternoon, there are 2 things that i need to sort do i can say it is finally finished.

The first is the brakes, i'm running a standard master cylinder, goodridge hoses, standard calipers and new EBC HH pads. I have to admit the pads are probably not yet fully bedded in but they definately feel a bit week, need such a strong pull on the lever that my wrist was aching after only a few stops. I'm wondering if my pistons are slightly siezed. I have a spare set, which apparently have new seals, i will swap out. Thought i'd post on here to get some feedback from all you other users to see what your brakes are like.

Then there is the old favourite of fueling, i'm now running a 3TJ airbox, with standard scoop, K&N filter, ebay stainless system with Micron can (road)

Low end fueling is spot on, feels almost impossible to stall it.
7 to 9k, the bike stutters and hunts for revs, on full throttle it struggles to pull through
9k+ bloody frantic.

This side of thing is certainly an area i currently have little knowledge, my logic, would say that as it goes like stink over 9k then the jet is the right size, would i be right in thinking that it is running rich through the midrange (it will lean off as the revs rise?) looking for some carb experts to hopefully point me in the right direction.

[cagiva996]

ive had the same issues as you with my 3tj/thundercat hybrid.the standard brakes are ok but most of them are nearly20 years old now.the 3tj master cylinder is a generic nissin 3/8 one used on loads of bikes.if you can stretch to it a brembo 19/20mm or18/19mm master cylinder improves braking power alot,you can pick them up on e-bay for around a £100 second hand..i had a yzf750/fzr1000 hybrid and it had the same master cylinder as the tj and a cagiva v-raptor which also used the same nissin 3/8 master cylinder and theyre crap-probably ok when new though.the good thing is that if you ever sell the bike you can take the brembo off and use it on your next steed-mines been on 3 bikes now.the same age relatd problems happen with the tj calipers but if theyre in good nick they will probably work well with a brembo master cylinder.you can put nissin gsxr750k3 calipers onthe tj using nk racing adapter plates,i did this with mine as the calipers on my tj were past their best and it stops well now.the fuelling issues are a pain and the best way would be to get it on the dyno with a good operater who knows his way around a set of carbs(arnt we old fashioned!!) but again this costs money,so the only alternative is to arm yourself with some jets and experiment with jet sizes and needle positions,although some patience is required and setting mine up was frustrating but worth the effort.anyway when its right you will need the extra stopping power!!

[smemly]

You're probably right about the fueling, would be a lot easier to give it to someone who knows what they're doing. Be nice to get it setup ready for some spring trackdays.

I've seen that you have some NK Caliper brackets, any ideas what ones fit the TJ forks, think i might take a look down that route as well. Got a couple of months of winter evenings in the garage to get things right, give me something to plan / play with.

Going back to the fueling, anyone know of a good dyno in the South East (Surrey)?

[w00dzy]

Im taking my NC23 Hybrid to carbon tek in Caterham this week.. they seem to be a good bunch and said that a full dyno tune with a dyno jet kit will be roughly £200..

Will let you know how it goes

[cagiva996]

if you can afford it,go for it it gets it all done in one hit and you get to see how much power its making too.,my first hybrid only made 75bhp(fzr600 motor,now r.i.p)) as it wasnt drawing enough air and put an fz750 intake snorkel on top of the air box as it was bigger than the tj one and jacked the tank up abit as the snorkel was nearly flush with the underside of the tank and restricted airflow which improved things considerably.the caliper hangers are from nk racing and are meant to fit if my memory serves me right an f2 350 powervalve but i will check as im a bit of a forgetfull bugger.the hangers were £65 quid deliverd,and very nicely made but the finish on them wasnt great and they go very furry so a coat of paint or laquer is a good idea.the calipers are nissin 4 pots from a gsxr750k3 which can be picked up off e-bay for about 40-50 quid,so 200 quid will get you a shit hot braking system if you can find a brembo radial master cylinder too!ive just bought an ap racing adjustable ratio master cylinder for £115 for the track hybrid so there are some bargains out there!how about posting some pics of your hybrid?

[Evilchicken0]

I run a Brembo Radial with Goodrich hoses and EBC pads in standard calipers and it's a very powerful system.
I don't think you need different calipers if yours are clean and the seals are good. If they are and your loosing power it's much more likely the master cylinder seals are leaking.

Im taking my NC23 Hybrid to carbon tek in Caterham this week.. they seem to be a good bunch and said that a full dyno tune with a dyno jet kit will be roughly £200..

Have you done a lot to the engine then ???
If it's just a can and air filter they should be able to tune the carbs to match without a dynojet kit ... of course charging you £100 for something you don't really need is always a preferance.
Watch out for the extra for cleaning carbs ... too.

[w00dzy]

Engine is standard, however it has a full s/s system and will be having 4 sock filters fitted.. I told them not to clean the carbs as I have only just done them.

What do you think?

Tune the carbs.. how can they be adjusted? I thought they have a balancing screw and that was it...

Dropped the bike off today Havent ridden properly for about 4 months I cant wait!

Sent off the V5 to dvla to get it changed for the mot.

[Evilchicken0]

Tuning carbs implies doing the mixture which is a bit more than just balancing them.
Ballance means all 4 open the same amount and the same time when you pull the throttle.
Tuning can mean the mixture as well (you have to ballance them first), you lift / lower the needles to change the mixture by small amounts. You fit different jets if it's beyond the adjustment in the needles.
Then you have the air flow ... usually set in the factory some tuner change the settings.

Sometimes fitting a Dynojet kit does more harm than good, they can use different jet and needle profiles.

[cagiva996]

calipers are tockico gsxr750 k3 calipers-not nissins-told you i was a forgetfull old bugger!

[smemly]

excellent, thanks guys.

got my eye on a a couple of master cylinders on t'internet. Think i might go down the route of upgraded calipers sooner rather than later anyway.

As for Carbon tek, they're pretty local so might be worth a punt, i await feedback of what they sort for you w00dzy.