Forum Replies Created
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Hey Jimmy, the biggest killer of CRF, WRF, YZF valves etc and most other manufactuers with titamium valves is not the air filtration, because if it was the bore and rings would be rooted and the piston skirt would probably be scuffed. And in most instances bore, piston, rings etc are ok. After many hours of engine building, then disassembly and inspection and after consultation with many other people experienced in the field both here and overseas.
The main reason is that the valves in these bikes are manufactured from a compressed titanium powder not a billet. (Cheap to manufacture) They have a hardened external surface which after time the valve seat actually work hardens and becomes far harder than the valve; which in turn breaks through the surface hardening of the valve. Then the valve seating surface pounds away at the seat and starts to take the same shape as the seat. Then slowly loosing valve clearance till there is none and the bike won’t start as it has no compression. It is called Valve Recession.
This is also a common problem with the Toyota BEAMS 3SGE engines that I build for rallying. (The cylinder Heads are manufactured by Yamaha and they have the same valves). Another reason for this is cam profile, but this is a story for another day.
The fix for this is alternative valve seat/valve combination, and I don’t mind saying this as the best people to sort this out is RAMS Head Service in Windsor.Hope this helps a little to understand this “Valve Recession” issue.
Cheers,
LeftyHey Mick,
Looks great mate. Wish i could be there.
Great Job you and Connor and to Adam and Sam for lending a hand, also to Protty for getting another headache and running another event up there. I am sure that it will be just as awesome as the last one and it is great to see for our sport. . Well done Protty!Great job keep it up.
Cheers,
LeftyYeah good report there Adam. Time to ride a proper bike eh.
The KTM350 would be a very nice weapon of choice. :woohoo: :woohoo:white rocket wrote:do you have bar raisers (i dout it )or an under bar steering damper(take them of) too high a bars seem to stuff up turn in i took the rasers of my 08 530 and lent the bars back a bit and this helped a fair bit(not as cumfy standing but) .i did not believe this untill i tryed it.reckon the correct spring would help two have a look on tecknics web sight it has spring rates and rider weights on it.if the backs that far out the front springs prably needs changing to $$$ i got some in the shed :whistle:Hey Rocket,
No i don’t have bar risers (vertically challenged mate) And my steering damper is an over bar type. I will have a chat to tekniks and see what they think; but I am sure it can be better. At the birthday ride it was awesome at Sunny Corner but i had new tyres and there was good grip. As soon as it gets a bit loose that is when it is a pain in the arse. I will keep trying. thaks for your input.As I say Every Day is a School Day!
Cheers
LeftyKing STM wrote:Hey LeftyYou mention lowering crown height and jacking up the rear end a little which should help but you could also try an offset bar mount. You are not a heavy guy so centering your mass a little further forward may help keep the front wheel more planted.
STM
Yeah thanks STM,
On the std triple clamps I have 4 bar positions. Mine was at position 2 I will now try Position 3 which is futher forward of the pivot point. So this in theory shuld bring my eight a little further forward.
Cheers
mal5.1 wrote:Do you want the double or single room? :laugh: Tell her there’s a near new bathroom for you to use here too.There would be nearly no weight on the rear spring by now. Maybe try splitting the diiference between static and rider sag. Doesn’t sound like you’ll make it any worse.
What offset are the Berg triple clamps. Maybe a set of them might be cheaper than the aftermarket ones.
Until Rudy chimes in I’ll keep thinking of ideas.
Oh and the shed has a bed and bathroom too if your not comfortable staying in the house with us…
:laugh: :laugh: The shed will be fine! :laugh: :laugh:
I am about 75kg with all my gear on and ready to ride. Which should be fine with the std spring.The only thig is that the berg triple clamps are 22mm which gives less trail. I have been reading KTM Talk and the majority of guys reckon go to 18mm offset to increase trail; this gives a more planted feel through singles etc; however this will give less stability at higher speed but this is over come by more steering dampening at speed as well as moving the rear wheel as far back as possible….
I will keep experimenting.
Thanks for your help.
I reckon it would be a good test for the BPD guards.
Hey Mick,
Unfortunately I’m out for this one.
I have to work that weekend as it is Rally Australia at Coffs on the same weekend. I am sure that whoever takes my place will have an absolute blast. Wish I could go.Cheers,
LeftyHi Rob,
Glad that your’e on board.
I know at least one Old Bull up your way……. Nothing wrong with the old DRZ champ!
Happy riding.Cheers,
Lefty
