Question about any restrictions fitted to European imported FJ's

[Alf]

No, it is not from Italy according the workshop manual. Maybe it could be from Japan, hence the 200 kph speedo

[MrGreenGiant]

Ok thanks Alf just wanted to figure out why the speedo clock was so low in KPH but it's so weird that I was told it was a Italian import, but some of searches said it was American and now it's Japanese. Regardless it's low mileage and very very little wear all round on the bike so I shouldn't worry to much.

Thanks again guys 

[Harvy]

I was told it was a Italian import, but some of searches said it was American and now it's Japanese.

So if it is restricted, the main restriction is the throat size of the inlet manifolds between the carbys and head........ restricted manifolds are 28mm diameter while unrestricted are from memory either 32 or 33 mm.
The carbys MAY be jetted differently (mine weren't) also.

My FJ was a Jap domestic import. I bought unrestricted manifolds from an eBay guy called Georgefix in the US.

Harvy

[Alf]

36Y code manifolds, fitted from 84-96 on free hp versions, work

[Simon_W]

Apologies for Resurrecting an old thread.

I have a 1991 1200ABS and it was a french import restricted to 100HP. After doing some research it appears that the Ignition unit and inlet rubbers are the restrictors, the ignition unit was changed before I got the bike but the 28mm rubbers are still in place.

I have some 36Y items ready to fit. I was expecting an easy swap with CHA screws, but can,t work out what these fasteners are. I assume that it is some kind of tamperproof fixing to stop home mechanics like me de-restricting the bike.

Out of interest the bike pulls very well and the smaller inlets may indeed assist low rpm with more torque while limiting ultimate high RPM output.

[Pat Conlon]

Hi Simon, welcome aboard.

I have not seen those before. Looks like France did not want anyone changing the intake manifold rubbers out (or servicing the O rings).
The manifold fasteners on all my FJ's have been allen head bolts.

Could these be tamper caps peened on to the allen heads?

Take a chisel and (carefully) give them a wack and see if they don't pop off. Other than that, it's time for a left hand drill and easy out.

[FJmonkey]

They may be obround/oval heads. Oval Head

[racerrad8]

I assume that it is some kind of tamperproof fixing to stop home mechanics like me de-restricting the bike.

Exactly. The easiest way would be to grind a slot into the head and use a straight blade screw driver to remove the tamper proof screws.

If you think it pull good now, wait until you get the 36Y's installed and the carbs rejetted...

Then you will know all about Kookaloo.

Randy - RPM

[Simon_W]

Thanks for the advice, will undertake some exploratory surgery after a ride out on Sunday.

It is difficult too tell from visual examination and i won,t know until I have the first out. initially I thought it may be some sort of nut. after further consideration and a bit of research I feel it is probably a shear bolt- see image.

Option 1: attempt to disk cut a slot to tale a screwdriver blade, with luck this will remove the fastener complete

Option 2: Grind the fasteners head off and remove the remaining stud with 2 nuts, vice grips, or extractor

When its out I will post a picture of the remains LOL!

[Simon_W]

Finally swapped my inlet manifolds from 100hp restricted French jobbies to standard 36y, hopefully I will be able to feel the difference on the road.

Removed ones 29m bore with drillings to prevent them being opened up. 36Y are 32mm

The tamper proof fixings were a real pita to remove,  security type shear bolts, attempted a screwdriver slot, no joy, ended up cutting in half and knocking them around with a punch. It went fairly well apart from one shearing in the head which turned it into a 6 hour job!

Not checked out the jetting, it was very rich at the top end evidenced by petrol fumes consumed by those following.  Where/how can I establish if the jets need adjusting?