DT125R ARCHIVE

gasto · DTR Respected Member

What head?

the only way is YAMAHA DTR · Guru

should be a 4fu or unmarked

DT-R_bradders · Guru

got any pics of it m8?

gasto · DTR Respected Member

Here are 2 pics

I have been looking up in the internet and i found that it might be tzr belgarda head which is named 4GM.

Although i am still confused.What are the diferrences in all these?What if i put a 4fu head on a dt engine?

Has anbody tried to reprofile a dt head to FIII specifications?

-- Edited by gasto on Tuesday 16th of August 2011 07:36:32 PM

the only way is YAMAHA DTR · Guru

dont think it matters as long as is not a 3bn head

gasto · DTR Respected Member

I remember some people saying that you need a flat piston for a 4fu head.Is it so high compressed?

Reef · Guru

the only way is YAMAHA DTR wrote:
dont think it matters as long as is not a 3bn head

Whats wrong with the 3bn head when used with different coded bottom ends??? after i replaced my 3bn bottom end with a 3rm on other dt it never wanted to start, could this be the reason?? lol

satelliteone · DTR Senior Member

the 4DL heads.. for the tdr and tzr belgarda

only markings is a "P" stamp on the head. Its on the side just under the water hose outlet to the carb. Not the water hose output on the thermostat housing.

Its quite tiny.

These heads where made by Motori Minarelli as with the bottom end too. Compression ratio of 12.8:1

the 4DL SP heads are a differnt design.

gasto · DTR Respected Member

Thanks for the info.Do you know the compression ratio of the 3mb?

satelliteone · DTR Senior Member

from the manuals on the 3mb00 and the 3bn.. eg. DTR RE and X 6.8:1
hope it helps.