rocker settings

[e gracie]

bit new to this game heartd u guys where the best at this?

as u can see iam from over the water in the uk....

2001 ex love it to bits.just popped in ims 440 kit mx cam hardend rockers .major spensive carb.jetted to suit runs like a **** heap at the mo...checked timing to the best off me knowledge it is correct... carb jetted correctly head gas flowed an ported matched to fmf full system..starts an runs well but dont really seam to be any different to me lot a money for nothing ..what av i dun wrong u all ask...been building hot rod engines all me life .so not un known to this game.all i can thinkl is i need bigger clearance betwqeen valves an rockers is it a different setting to std being mx cam??
go on a bit dont i...
many thanx in advance for any hel;p given.
yes i have checked the timing several times was thinking off an adjustable vernier cam sprocket but been told it should fly as it is....plz elp pulling me air oot.....

[SlapNutz]

i cannt help with motor fixin things :macho

sounds like your jetting is off gracie... Does it bog or backfire when you are giving it gas or letting off the throttle??

Welcome to exriders..:D

[skinrider440]

Originally posted by Rico
sounds like your jetting is off gracie... Does it bog or backfire when you are giving it gas or letting off the throttle??

Welcome to exriders..:D





DITO

[e gracie]

weird sounds fine but aint got the umphh.no backfire when throtling off, no miss all through the.power range.if it was a twin cylinder i would say 1 was low on compression...pressure tested it and all valves are well ground in..
strugling to say the least

[e gracie]

also checked resisitanace on low tension side.wiring nothing up there....running re mapped ignition .taken that off an tryed original still the same old yuk... new plug also..even tryed original exhaust in case it was blocked or sumayt in manufacture...giving up slowly.........

ps how do u change u r profile name?/ was ment to be nuegent

[MIKE400EX]

What carb and jetting do you have?

[e gracie]

cant remember name off the carb off me head same make as original but bigger all round supplieed by ct racing? 350english money running165main jet all as the spec up for my mods.can post carb details l8tr once ive been in garage for a look..also running umi filter in ali box no lid.if it elps at all..


got to add nice site ..well imformative!!!##

Sounds like you have a FCR carb that's just not jetted to perfection...you should definitly feel a large Ummph of power after all the mods you added to it. Does the name FCR sound famileir with what you have??

[e gracie]

thanx for all the imput guys,,,,. it is a FCR 39 jetted by kik who specialise in this but they live 300miles from me ..

nother question .cam sprocket can it be on wrong? had lobes off cam pointing down when marks where in line.../// ??
cant see it being any other way as it would defo hit piston. ime sure. as i know u can fit sprocket either way round..

gona break it down again the weekend me thinx what jeting & needle position u think it should be -with the above mods...sorry if am going on a bit but lot a money gone in ere an ime pulling me hair out an, snow isnt that far away cant beat riding in snow as u all know....love it

FCR guys can ya help our english buddy out???

[YZROOSTINYA]

you should be slighty above the stock clearance settings for the cam. stock is .004 and .005, you should be .005 and .006. the valve clearance would not cause a problem unless there were not closing fully causing a loss of compression. if your compression checks are turning up correct than this cant be it.

your carb has to be off or there is a block in the intake somewhere.

with those mods there should be a very noticable increase in power.

good luck.

is then throttle cable adjusted right? spark plug boot fully on?
too much oil can cause alot of pressure int he crankcase, is your oil level right?