TM400

[Toolboy]

Gday all,

I have just purchased a 74 TM400L and looking for specification info or possible workshop manual online??

I need the following:

Fork oil + amount needed
Sprocket sizes
Carby main and pilot jet

I will be racing this bike so any further info from fellow TM racers would be appreciated

Tim

[bazza]

TS400 electrics to help smooth wicked power band.

[Lozza]

Pony up for decent suspension. Flywheel weight or TS ignition, decent pipe, 36mm Mikuni and away you go.

[Toolboy]

Yes defiently the suspension upgrade + exhaust

Do you know if you can still purchase the flywheel weight and where??? I have read that it is an improvement.

Thanks

Tim

[Marc.com]

Do you know if you can still purchase the flywheel weight and where??? I have read that it is an improvement.

Make one there are a couple of flywheels on ebay USA at the moment that have had the weight added so you can see how it should look. Remember needs to be brass/stainless or something non magnetic.

http://cgi.ebay.com/ebaymotors/TM400-1974-flywheel-rotor-magneto-fly-wheel-tm-400-/180626600423?pt=Motorcycles_Parts_Accessories&hash=item2a0e2f31e7

Personally I think a swap to TS ignition is a better idea, TM rotor only gives you the space for narrow flywheel weight that dangles off the end of the crank. Dangling heavy narrow discs at high rpm at the end of the crank smells like a great way to kill the main bearings. Plus flywheel weights back in the day were prone to come loose and fall off. Notice modern ones use the crank nut or extraction thread to hold them on.

[Toolboy]

Im still not so sure about the additional flywheel weight now that i have ridden the bike a few times, it is geared 15/45 which seems tall and gives smooth power but i have no idea what original or race set up is?

Thanks guys

[frostype400]

Why every one is always trying to fix the tm400's I am going to run mine stock standard.

[Marc.com]

Why every one is always trying to fix the tm400's I am going to run mine stock standard.

Pathelogical desire to modify everything I guess, though I like my cars stock as a rock.

[mx250]

Why every one is always trying to fix the tm400's I am going to run mine stock standard.

In the history of motorcycling there have been motorcycles that the engine has conspired to kill the rider. There also have been motorcycles that the chassis has conspired to kill the rider. And there have been motorcycles that the suspension has conspired to kill the rider.

Fortunately there has only been a handful of motorcycles whose engine, chassis and suspension have worked together to conspire to kill the rider.

The TM400 is one such motorcycle.

Be afraid, be very afraid.

[frostype400]

Mine needs a bottom end rebuild and it is set to go the barrel is done new piston and rings I just need to spend a fortune and it will be done.

[211kawasaki]

keep it standard, I have the busted cranks of some years with TM400s and I only learnt one thing, standard is best. Andy Caldercott raced one stock but his biggest tip was the rear shocks - they had to be off a TS185ER that was his big tip - and keep it standard 34mm carb and all.

[Toolboy]

Yes im defiently looking at keeping mine a sstock as possible with the exception of the rear suspension.

Any recommendations? Works Performance??? Ohlins would be nice,,hahahah

[Lozza]

The 36mm Mikuni and reworking the transfers yields much better bottom end.