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850 v 900 cylinder head differences?
Posted: Sat Jun 28, 2014 6:40 am
by ron850
Apart from the mounts being cast on different positions on the head what are the other differences between an 850 and 900 head?
Bigger valves on 900/better porting etc?
I am aware the cams are different with 900 ones having a phase sensor
Re: 850 v 900 cylinder head differences?
Posted: Sat Jun 28, 2014 10:08 am
by sanddune51
The valves are definitely the same as the later revised Trx ones. Not certain of internal differences but I would expect the porting to be the same as the Trx and 850Tdm. I believe the external differences are well understood and documented on this forum.
Mark.
Re: 850 v 900 cylinder head differences?
Posted: Sat Jun 28, 2014 10:53 am
by Rod.s
sanddune51 wrote:The valves are definitely the same as the later revised Trx ones. Not certain of internal differences but I would expect the porting to be the same as the Trx and 850Tdm. I believe the external differences are well understood and documented on this forum.
Mark.
The inlet ports are scolloped to allow for the injector spray pattern
and the external casting is different…plus…..mmmmm
Re: 850 v 900 cylinder head differences?
Posted: Sat Jun 28, 2014 7:39 pm
by Killerwhale
Rod.s wrote:sanddune51 wrote:The valves are definitely the same as the later revised Trx ones. Not certain of internal differences but I would expect the porting to be the same as the Trx and 850Tdm. I believe the external differences are well understood and documented on this forum.
Mark.
The inlet ports are scolloped to allow for the injector spray pattern
and the external casting is different…plus…..mmmmm
And the TRX enjun is a bitch to carry, whilst the 900 is much lighter. I´ve tried both
