Yamaha TRX850 Enthusiasts Forum

Quite some anxiety when going to start it up but it actually started easier than it use to do!
Cops have speed week over here and i´ve got my pic taken already so i´ll wait a while until i´m going full throttle.

Map is made by Topham Germany on a bike with 117PS (Ok it blew head gasket every 30h or so but anyway) and the same setup as me....this will be interesting and i guess it´s time to book a dyno!

Dude who own the bike has installed the quickshift feature and i guess i´ll go that route meself.
It also have immobiliser feature wich could come in handy!

117ps - seriously? That's impressive

More details please

phuk72 wrote:117ps - seriously? That's impressive

More details please

Well, they according to them ran it at 17,0:1 compression....hence the blown gasket quite often...not really for road use
Otherwise same setup as me, don´t know how the head was done though.

Killerwhale wrote:

phuk72 wrote:117ps - seriously? That's impressive

More details please

Well, they according to them ran it at 17,0:1 compression....hence the blown gasket quite often...not really for road use
Otherwise same setup as me, don´t know how the head was done though.

17 to 1!!!
Ferk me were they trying to create liquid oxygen in the combustion chamber?

Mincehead wrote:

Killerwhale wrote:

phuk72 wrote:117ps - seriously? That's impressive

More details please

Well, they according to them ran it at 17,0:1 compression....hence the blown gasket quite often...not really for road use
Otherwise same setup as me, don´t know how the head was done though.

17 to 1!!!
Ferk me were they trying to create liquid oxygen in the combustion chamber?

Yeah probably, last thing i heard was that they where going to go down to 13,5-ish to get it reliable...

Pre-ignition would also be a big problem at compression ratios that high too, what were thay using as fuel, Avgas?

Mincehead wrote:Pre-ignition would also be a big problem at compression ratios that high too, what were thay using as fuel, Avgas?

Standard fuel, but as you ask....there are a Swedish dude who E85 converted his Harley and put a bigger carb onit, increased the HP by 100%!!

E85, that`s bio-ethanol is it not, well 85% bio-ethanol hence the name? Yes I`ve heard good power increases can be found by using it.
Sweden has quite a good infrastructure of outlets for it too I believe?

Mincehead wrote:E85, that`s bio-ethanol is it not, well 85% bio-ethanol hence the name? Yes I`ve heard good power increases can be found by using it.
Sweden has quite a good infrastructure of outlets for it too I believe?

All stations are required by law to have it!

BOT

Been out for a ride now, moderate speeds as cops have "speed week" over here. One VERY noticable thing though was that the bike responded the same as when i had the MAB system on and that with the big akra can wich where a total dog before.
Now it pulls clean from 2,5k....happy day´s! BOS superbike cans on their way from Germany...should be better that the crappy akra!
Gotta do a dyno soon for the A/F ratios...

Killerwhale wrote:

phuk72 wrote:117ps - seriously? That's impressive

More details please

Well, they according to them ran it at 17,0:1 compression....hence the blown gasket quite often...not really for road use
Otherwise same setup as me, don´t know how the head was done though.