jimmyl

I like the all or nothing approach !!

My thinking exactly. std set up on 4t is no crank seal. 4 rt has separate oil for engine an gearbox so must be a seal between gearbox and crank on off side ( there are posts about this blowing out if to much engine oil is used), if crank pressure is the holy grail then if you take the dip stick out engine braking would increase?? project for the weekend???

Most 4ts vent crankcase to atmosphere so presssure on down stroke is negligible ?? Std 4rt goes into bottle under headstock and then air box for emissions but most dump this and vent to atmosphere.

I.e. Induction stroke with throttle closed. But curious to understand how does a valve in crankcase effect induction tract?

I know what the blurb says but is thete an actual crankcase valve that lifts the valves. The old tlr had a cable to aid starting. I see nothing external on the later bikes and nobody has shown anything like a vaccum operated valve lifter etc on parts list. is it in the cam and the rest is smoke and mirrors as the later bikes definitely run on more. dont think it is in the mapping as have run both new and old throttle bodies. I'm not questioning the effectiveness just trying to understand the mechanics if it.

Yep - Not much engine braking when the throttle is open!!!

I'm reasonably technical but have wondered how does this work. i always believed the 4t engine braking was due to the extra stroke taking momentum out of the engine- i.e. Power required to push out exhaust gasses and compress the fresh charge. without lifting a valve or reducing compression how else is engine braking reduced unless my thinking is completely wrong.

Maybe a john bliss mod or Martin Willmore. I have heard somebody talk about this type of mod - not sure wether on tc or at local events. i think old school mod as ptb mapping is less involved!!

Maybe the 50/50 has been dropped to soon. If O40 routes have been eased for 2017 then by default the 50/50 route for the O50s will have eased and the O60s would have had a steady ride as half the section can be set out exactly for them and the easier O50 section should then still not be too hard. Its not necessarily the actual severity of a section which can cause issue but the style - a bit like when twin shock and modern bikes share sections - a big blast and climb to a younger/better rider (modern bike) who can hang on is an easy clean - if your not so brave or strong (or twin shock) then can be a big tumble from a height. A slippery rocky stream may take marks off the best O40 but could quite easily be cleaned by a good O60 rider. Getting routes balanced correctly at club level just on a variety of abilities can be difficult -even more so when age is added to the mix. Still think is a great series and last Sundays trial really enjoyable and well organised.

2016/2017 footrest hangers are about £23 each available from any Honda dealer. Might be an alternative to changing bars??

I really enjoyed the trial and was superbly organised. I felt I rode well on 16 marks lost on easier route ( forgetting a soft 5 ) but some of old old twin shocks and older riders looked to be struggling a bit but wouldn't want to comment on their behalf . Not sure on o40 but wouldn't want o50 route to be any easier. Graham won it on 6. ignoring any possible debate thanks to all involved yesterday and to all organisers and observers for the rest of the year

Interesting - Vertigo focused on SSDT and the bikes seem to have good reliability GG possible one of the worst durable bikes now chooses to disrespects the SSDT Nuff said??

Mr Sunter speaks the truth. 1st for 90% of everything unless maybe you live in the south or you are a man called Bou. Steady in first then use the twisty thing in your right hand if you want to go faster. The Mont will rev and get up stuff in bottom if you give it some stick -it will also grip and allow you time to recover due to its torque. If its quite steep then 2nd -if its really steep 3rd. Only exception is mud which I do not confess to have mastered but 3rd gear, a steady throttle 1/2 open and a very progressive slipping of the clutch seems to work - not 2 stroke rev and burn!!

Been in the ground a bit longer than that . If you've got it might as well use it -only gearbox/clutch so you will soon find out how it feels without any damage

Just don't ride into trees!!! didnt think throttle bodies were remappable on standard bikes. suggest work on clutch adjustment coordination between throttle and clutch.

Sidi modern gaerne's don't last. had issues with stitching and soles wearing down quick. sidis much cheaper and much better support and so for wearing well. (9 months heavy use )

Apologies got a 4rt keep forgetting about that fuel tap thing and carb breather pipes and floats levels

elf or ATF (ATF is my preference) Lay your bike on its side if DOOOOOOOD MAAN didn't say so.

blockage in rubber hose from air box to Throttle body Have you got the oil bypass tank going into air box still -are you blowing oil into air box confusing air mixture sensor. If you have fresh oiled filter or even spray penetrating oil on the bike when it is running it effects the running starting of the bike.

Air leak on induction side, vacuum hose issue , short circuit on cables/relay under the tank when you re-fit tank but not when tank is off. Throttle cable routing when you put tank on?

Appreciate events are difficult to get sorted but would of been good to have 2107 regulations at least on there from the start of the year - 1st round is not advertised but Mansfield later in the year is??

Makes sense. Normally hear suggestion for the coming year at the last few rounds but didn't pick up on anything until the regs came out for 1st round. The normally very useful ACU web site seem very slow to catch up this year with no full dates and no 2107 condition on there yet. (not just Normandales ) If severity of easier route went up due to no 50/50 I had concerns for the O60 riders but if easier route is going back to Pre 2016 severity then should be ok. Back to the future as they say!!

- Your a genius - Of course it is a HONDA - that's what we all go on about Full spec of bike appears - full comp under £90 Back of the net

Trouble is they seem to have there own data base and on that 4rts are 249cc. Have been on line a called a couple. Trouble is if there is a discrepancy they will void a claim. Jonny what cc is on your documents?

Anybody know reason why 50/50 route has been dropped for over 50s class for this year.