I have 211's in my 103 08RKC and I got to say that stock 96ers are kicking my arse especially since I am 100kgs and my wife who is about 55kgs is always with me as well as the RK being a little heavier than most other HD's.

I was disappointed in the build when I got the bike, I did expect more from it.  Dealer dynoes have not done alot and True Duals lost a little more bottom end.  I know this motor is more capable and have gone down the TTS path.  The TTS has given me far more responsive and a harder pulling bike in the mid to high range but I dont think the bikes potential has been realized because of the cams.

So here is my question;  What cams other than 203 or 204's should I be looking at to get a little more low end torque without sacrificing the the touring end of the bike too much? I figure bolt in cams, perhaps using the same push rods.  As much as I do the K's touring I think it still should be good in the twisties and reasonable off the mark.

Thanks Fred

I love great looking harleys but I preffer ones that go.

 

 

s/e257 if the comp is not higher than 9.7 C.R. S/E 258 is with 10. to 1 - 10.8 C.R. a little less power down low, or gear drive andrews G67 cam , 07 up stock heads will take .580'' lift O.K. 590 is a no no with out cutting the valve seats to give extra clearance , stock springs have a total around .620" all up travel so are safe at 570 , 07 up stock heads have plenty of valve seal clearance about also .620"+ any help is good cheers

Thanks guys for the replies. It seems I may have to look at doing the heads which will open up a whole new range of options given the top end is pulled apart. So if I want a good bang for buck, not so hot build any ideas. It would entail headwork, pistons, cams etc.

hi do you have the top-end off already, i thought the dealer did it out from 96 ci to 103 ci , how many klms old is the top-end ?

Hey DR,
Top end still on and bike running. This build is as got from the dealer new. So far 34,000k's. Like I said I was dissapointed with the bike and will look at redoing the top end sooner than latter but before I start I want to know exactly what I am going to do and what I am going to end up with. Currently 88HP and 90ft/lbs torque. Not that much better than stock. So without going over the top I need to figure out where to start. Where would you start if want streetable tourer without going to real high compression.
Thanks

hi, see if you can find out what comp ratio or type of pistons are used e.g. a stock 07 up 96c.i. is 9.6 C.Ratio using flat top pistons when bored out to 103c.i. it goes to 10.1 to 1 comp ratio using flat top pistons . i would say that it would be the later , if you can find out as a check first were you brought the bike from we can go from there, you should be able to buy a bolt-in cam that would be better like S.E.257 or 258, theres not many real good tuners around on the late models even with there dyno's so be carefull , what town are you in ? i will catch you up tomorrow night as the computer is in my daughters room. cheers

hi , i have C.C ed up & ported & polished 7 sets of 07 & up cly heads , cly head vol is 84 c.c. cly head gasket vol is 7 c.c.=91c.c. , 4,375" stroke x 3.875" bore = 103.19 c.i. = 1,691.28 c.c. = 845.64 c.c. per cly . add total head = gasket vol + piston swept vol = 936.64 . divided buy 91= 10.29 to 1 comp ratio thats with a zero piston deck height , they are about 0.010" to 0.020 " minus on piston deck height i set them up for about minus 0.005" to 0.010" deck height to get the squish 0.045" to 0.050" using a 0.045 " cly head gasket , buy not setting the squish up or machining the bottom of the barrel the comp ratio is fare to call it 10 to 1 or 10.1 to 1 C.Ratio they are a big motor the 103 c.i. we have 102 H.P. + 109 Ft LB of torque, using the S.E 257 very good power low & mid + up top. S.E. 258 are a bit less torque down low but more easy to tune & idle smoother because 258 have a latter lobe centre & latter timings slighty . stock 07 up 96 c.i. motors are 9.5 to 9.6 comp ratio to start with , buy increasing the bore dia you increase the swept vol using the same cly head cly head . S.E 211 cams are not broad enough in there opening & closings esp on intakes for a 4 3/8 " stroke big bore motor they have a lobe centre of only 101.degs the inlet closes at 45 degs A.B.D.C. they are the 1st 2 important numbers when looking at cam spec the e.g. S.E. 257 has a intake lobe centre of 102 degs & closes at 48 degs the S.E.258 intake lobe centre is 103 degs & closes @ 52 degs . i have another set of late heads here only done 10 klms i will re C.C. them up tomorrow just to double check that they are 84 C.C. head vol . if you like i can show you how to work -out lobe centres on cams its the spec they don't like to give out un less they have to a cam under 101 degs can pinking under load depends on C.Ratio stroke lenght engine size etc .the latter the lobe centre + the closing of the inlet the more comp or size of engine e.g. a latter type cam in a smaller motor power will come in latter in the rev range esp if the comp is not up there , the hard thing is to build motors that are not pinking on our pump gas harleys are a heavy type bike with a very long stroke standard e.g E.V.B.T. 4 1/4" stroke no car or bike had a stroke this long. a 454 chev is only 3 3/4" stroke

DR. I am due for a new master cylinder under warranty next week, maybe the dealer will do a CR check for me.  The build is 103, SE Flattops, 211 Cams, SE Airfiliter, SE Mufflers, V&H True Duals and TTS.  I am in Sydney, which town you from?  Thanks

It seems I will have to change the cams which I don't mind doing to get the right build. So given the 211's are gone from the equation whats next with the existing head and bore? Still HC pistons and some mild head work with which cams? Again does not have to have stump pulling power low down, just good off the mark and good pulling power over the rest of the range. Your opinion is as valid as anyone elses. Other experts got me into this mess and yes I wouldnt mind potting the odd shot!

I would be leaving the cam in Mainey and adding a 95 kit with suitable pistons to get the 211 working.

cheers
Surly

Yep thats what I'm thinking Surly / Scotty, leaving the cams in, been talking to a bloke today who can fit up a set of S&S 95ci forged domes, bore existing barrels, would I need comp releases with this CR.