After reading many of your post regarding the Jun lightweight flywheel and TRD clutch kit I decided to go for it and a got a set of each. I took some pics during fitment and are shown below. This mod is a MUST if you have a supercharger. The car has totally transformed. You can feel the power of the car going to the road and of course it leaves you with a big smile. The acceleration is something else. Lightweight flywheel, upgraded clutch kit, supercharer kit and short shift kit is a must for a Lexus IS200. Now on the road the clutch is a bit more hard to press to change gears but i got used to it very fast. Also it is easy to drive in traffic. The car does not kick when i start from stop and also during reverse-parking. I can only say now that the clutch now engages from almust the start and not half way of its travel.

Here are pics during installation:

OEM flywheel and clutch next to gearbox:



Lightweight flywheel before installation



Jun flywheel on the engine:

Possibly the best transaxle upgrade you can do to the IS. The response is really nice once you get rid of that oversized paper weight!

I have to say though that even though that may have been a new fly wheel you never know how long its been sitting for. Machining your flywheel is a must and it will cut your bedding in time in half...

Hi, i believe skimming the OEM flywheel is not the best solution. I have many accidents happening from this solution. Better to get an aftermarket!

Yes machining a dual mass fly wheel is flawwed logic for many many reasons, first being notably that the dual mass is a good 15-20Kg (It felt that heavy lol).

No I was refering to machining the new Jun flywheel you just used. Some people think its a waste of flywheel meat but shaving .1mm (at the shallowest point) would ensure the flywheel hasnt warped from environment heat cycles and hunidity outside of normal operating conditions.

Always a good thing to do...

Heat cycles of 10-20 degrees in a normal enviroment warping a flywheel?

Surely if that can warp it it's going to be stuffed in a second in the hell that cars are.

I'm not an expert in the subject (only had to do a couple papers 6 odd years ago on metallurgy) but that doesn't sound right.

Maybe just for balancing/flatness reasons if not from a well known brand that guarantees its with in spec is what you're more worried about?

But surely JUN would be of a quality where they guarantee it to be with in a spec.

I agree with you stated mate. Jun is a well known aftermarket supplier. I have never heard problems for their products. I also know many European Lexus owners who have fitted this flywheel and do not have any issues with the part.

So sitting on a shelf for 5+ years going though many humid days and heat cycles doesnt affect steel whatsoever??? That doesnt sound right to me...

It is common practice to machine flywheels that have potentially had a high shelf life + sea time...

Only machining I got done on my JUN flywheel before fitting was the flywheel and pressure plate balanced together.

^^^ Exactly :)

Greasy hands clutch assembly makes baby jesus cry :(

x 2 :(

Needs more this....

note: clean everything with metho / brakeleen or something that leaves no residue, wash your hands and then don't even touch the friction surfaces. It pays to be carfeul.

i was planning on doing this very soon, how much and where did you get it from? please pm me if needed.

i'm not too happy with the stock clutch and flywheel setup, my car is loud with the short ram into the supercharger and i have to rev relatively high from a stand still to get the car moving.

does this clutch setup make the car move of the line quicker like normal cars?

i was planning to getting the jun fly and exedy sports metal S. gonna cost me around 1k shipped.

I got the flywheel from Jun auto in japan, the trd clutch kit i got it from Ireland.

The clutch is a bit more elastic and you need to put a bit more force on your foot.

A lightened flywheel will make things worse for you. By taking away rotational inertia you will increase you cars likely hood of stalling or bogging down. meaning you will have to use even more revs.

If you find the car has less torque down low because of the supercharger then you need to reconsider your set up or accept the need for more revs.

oh okay, thought clutch will catch more compared to a standard with the dual mass.
can anyone comment on the light flywheel setup with the supercharger? do you need to give it more revs to get off the line?

The dual mass damped flywheel is to isolate the 6 speed gbox from the engine vibrations. To remove it will reduce the life of your gbox. Yes I know everyone does it, but an engineer at Toyota thought it necessary enough for all the added expense and complexity.

Did I read there is some sort of restrictor valve in the stock clutch line to slow the action of the stock clutch (I don't know I've never had one). remove this ad you may get back some control.

x2 on all what has been said above by yojimbo.

Ideally, keeping to the dual mass will help the torque delivery at lower revs.

Yes it will help the engine rev through the rev range quicker and the revs to drop faster (less load) but as above, will also lose alot of the lower end drive. Think higher rev'd hill starts etc!

I have just finally flogged my front input shaft and the input shaft bearing bearing in the gearbox due to the slight vibrations from a Solid/Lightweight flywheel. Have gotten about 5 years out of the gearbox with the use of the Solid/Lightweight unit.

Matt the clutch damper you are referring to was found in only the USDM IS300s. The GXE10 and SXE10s have a direct clutch hose :)

I am running the Jun, i can feel it reving a lot quicker..but the price i am paying to have that...its really only worth it since i will be tracking...

and from the experience..i think when i go turbo later i'll go back to dual mass. less vibration. easier to drive :)

i always have to rev quite hard to get off the line to not feel bogged down..espeically up the hill...and when u r running buddyclub spec2 that is really the last thing i wanna do...

I have a 6.5Kg flywheel in the IS200 and given that the car doesnt have alot of tourque it took a while to learn to match revs down shifting and letting the clutch grab and punching it properly when upshifting or getting off the line. A lightened flywheel teaches you to be more acutate on the clutch because its a hell of alot less forgiving I assure you and this is why its so harsh on your gearbox.

The heavyer the fly the more resistance to shock from rapid changes in rpm the drive train will have. It will also have more stored energy to keep the engine running smoother (less lumpy, especially noticed when you up your cams). Lightened flywheels are only good for acceleration and deceleration and getting of the line quicker but you have to be able to pinpoint that friction point and rev as required.

In my experience you need more revs to get of the line but upshifting is easier, downshifting is also easier but a hell of alot less forgiving!

The reason manufactures use a dual mass is because the end user can be more sloppy and harsh on the drivetrain but still feel smooth without further increasing the mass.

More flywheel mass > smoother ride...

Dualmass cuts the wieght but offers a smoother ride.

Penut, going dual mass on a turbo setup will end in tears I assure you !!! Opt for a stronger box instead!

The only problem I have noticed up to know with the light flywheel, is to start smoothly on an uphill from full stop. Need to rev the engine before i leave the clutch in order to start or the engine will shut down. Also i feel more vibrations from the car after 4500 rpm during acceleration.

cheers for the info guys,
does anyone know where the nipple is to bleed the clutch fluid on the is200?

also is it possible to add a exedy or trd clutch onto the standard dual mass?

Two bleeds, one on the clutch slave and one on the clutch master.

Exedy do specific kits (aswell as OEM which are very well priced for VIP members) to suit the dual mass flywheel.
Just need to machine it correctly with the step etc.

Exedy part numbers for kits to suit the OEM Dual Mass Flywheel
SXE10 3SGE - TYK-7408
GXE10 1GFE - LEK-7222