Post by: graeme on January 15, 2021, 01:07:45 am
Geez ... all this discussion on cranking out more horsepower at higher revs. In my humble opinion thats not what the MT01 is all about. Thumping grunt at low revs is what puts the smile on my dial. Spose we're all different but no way I'm forking out a squillion dollars for more high end horsepower. Cheers
fair enough, discussion on the old forum made it clear that it was a lot of money for not much return and I agree. However, I dont regret it and am really enjoying the bike.
You dont loose the massive torque on the bottom, the bike is not unreliable or difficult to ride. One of the features of the Crane cam that Patrick ended up with is that it retains its usability.
I am telling you about it as the results of different mods are a bit unknown and of some interest to owners (well I thought so).
The inlet changes are perfectly doable for anyone using the parts from other big yams(stratoliner etc). The inlet bits are just scaled up versions of the MT and just needs a bit of material removed from the outside of top covers.
I,ll put up a audio of the bike on the dyno later and dig up the graph off the dyno.
Post by: Jota on January 14, 2021, 05:10:33 am
I'm old school and the bike I choose to fiddle with is a 1981 Laverda Jota. I can pull the engine out of the frame and completely disassemble in half a day. Carburettors can be tuned with a screwdriver. The MT is not a bike that is easy to work on ... hell its a job just to replace the spark plugs. Of course it all becomes easier if we pay someone else to do it ... but where's the fun in that. ::)
Post by: Danmt on January 12, 2021, 04:34:43 am
And fun is what it is all about in the end.
"He who looks for a practical motorcycle has understood nothing".
Post by: Jota on January 11, 2021, 10:06:18 pm
Post by: graeme on January 11, 2021, 10:57:45 am
Covid has made an interesting year and all the best to you in uk and europe.
I talk **** sometimes and my claim of 235 before the bridge was untrue, a bit.
My MT is now geared with a 16 on the front and gets 215kmh before I back off for turn 1 at PI.
Its pretty quick and handles well around the circuit.
Have done several more days there since last speaking with you.
In march 2020 I finally got it back to the dyno after making some induction changes that greatly changed stuff.
Where I had standard induction manifold with 34mm injector bodies on top It really needed the 34mm inlet manifold as well.
So the dyno gave 120hp at rear wheel and torque still around 167nm.
Onto the 34mm tubes you put 50mm silicone inlet hose about 80mm long. It goes inside a 60mm pod about 150mm long.
Great fun to ride, is proving utterly reliable and turns heads.
By end of ride day it earns respect.
A pic from the island in early december 2020. First time back since covid lockdowns.
Post by: ridon29 on January 06, 2019, 11:27:14 am
R
Post by: Danmt on January 05, 2019, 05:23:42 am
Post by: graeme on January 04, 2019, 11:20:52 pm
Thx for reply. I have heard that 500 extra rpm is on the cards. Hi comp pistons should make a good difference though in conjunction with other mods. I have done quite a few car engine rebuilds (mostly classic mini and fiat twin cam.... yes I am quite old ;D, and gained a lot of hp/torque by doing a lot of small improvements rather than one big one. That's why i ask, has anyone done this or similar and does it make a good noticeable difference?
R
Hi, 500revs is what you get with either a stage 2 or 3 reflash. The standard engine has no top end and improving exhaust and intake along with a minor reflash (t4,s special version) is about all you can do. Still no top end but a bit more elsewhere.
If you do anything to engine, do the whole job. Hc pistons or overbore will do stuff-all by themselves.
If you do the patrick thing then do the hc pistons, cam kit (which includes different lifters) and the full head job which includes larger valves, higher lift springs and porting. You cant use their cam with standard head. Because of the different lifters you also need their adjustable pushrods and the pushrod covers which are needed for the initial bleeddown. (these covers lift up for adjustment of pushrods)
You get an engine with a really strong top end and still plenty everywhere else. It runs very well with no bad habits.
I call the whole patrick job a stage 4 engine because the original yam s3 kit did not include any head work.
You can include 43mm intake manifolds and injector bodies from a stratoliner (wreckers USA)
For all the effort the result is not that great but I have no complaints. Patrick use changeover parts for some bits and the cams can be from stratoliner for them to modify. They offer a couple of options for going oversize. I went to the largest without a resleeve cause happened to pick up a set easily so bike is now an 1775.
A personal report on how it goes? Well it happens I just did a day at phillip island gp circuit in december. I have never been on a racetrack and went through california superbike school. All have to start at level one which is not a full on track day as they have a program of things to work through.
Still no worries about hammering it down the straight (which you all know from tv) and I wasnt coming through turn 12 very hard but still hit the 6000 limiter in top about 100 metres before the bridge. Thats 235kmh I think (they cover your speedo) and its a strong pull all the way.
I would be very careful of any thing bought second hand that says its s3 or patrick and if patrick then it needs to have all the bits like the hydraulic lifters. Happy to help with any advice. Here we are on dec 17 ;D
Post by: Blzeebub on January 04, 2019, 03:01:51 pm
The seller claimed a full Patrick S3 with valves, oversize pistons etc.
B-)
Post by: ridon29 on January 04, 2019, 09:39:38 am
R
Post by: Danmt on January 04, 2019, 06:20:00 am
Only curiosity.
Post by: graeme on January 04, 2019, 03:40:11 am
Has anyone gone down the patrick racing road? Thinking of Hi comp pistons, head/valve job and possibly cams. Any thoughts/ advise. Despite baltic weather here. N Ireland, went for a good wee run today.
R
Yes, I have. When we write something on a forum or email its really easy to make it sound not quite what you wanted and give false impression.
You mention "possibly cams" If, on any engine you were upping compression and doing head work a cam is part of that whole deal as you are really altering the original specs.
That suggests you dont have a clear idea of what you are getting into and I just want to (with great respect) point that out.
If you do go down this track then it is Pistons, cam, ecu reflash, exhaust and intake improvements at least. If you add in headwork then you go for the full job which includes bigger valves and hi lift springs.
Happy to offer advice.
cheers Graeme
Post by: ridon29 on January 03, 2019, 07:43:13 pm
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Post by: Tartofraiz on January 02, 2019, 11:30:01 am
Post by: mt01ash on December 31, 2018, 04:33:37 pm
Post by: gorilla on December 28, 2018, 05:57:52 pm
