understanding cam spec's
- Thread starter HA Y N
- Start date
bigkelk9
Well-Known Member
JMO, after talking to S&S and doing this huge tear down on my bike recently, it's worth the time and money to shave ur heads, have them re-done with the correct valaves to accomodate the 600 cam and put to specs that it's supposed be.. not these specs our bikes came with to meet EPA requirements and all that.. just my 2 cents. It'll be well worth your time.
waiting for the cam from Curtis, The information in the video's are very clear and helpful, I think most of us our riding style supports the 585 cam with the lower rpm ranges and two up riding torque, I did speak with John Sachs and got a lot of schooling from him! I do agree with Kel that if and when a guy can afford to rebuild the top end and add compression is always the way to go! also having the peace of mind knowing the work that has been done to your top end, not hoping big dog did not cut corners on your motor or employee was having a bad day!Are you thinking new cam Cal?
For now this should be a great improvement according to everyone that installed the 585, But when my bike is ready and I can afford it I plan on having John work his Magic on my heads.
bigkelk9
Well-Known Member
Whaaaat???? Never!!!
heybaylor
Active Member
well, after fixing the sumping problem, and touching every part on it ( sometimes with a wrench, sometimes with new connectors)
the pit has been trouble free, Only problem I have with it is bumps/holes in the road.
S&S as well as John Sachs recommend bump up compression and 600 lift cam is the formula to go with! if I am not mistaken the 117 is a epa 107 and I think not sure but the 107 was a non epa motor has the 600 lift cam and would walk the 117? not sure correct me if wrong
There is no real good reason to hot rod these motor's with most of our riding styles and decent power they come with, But it sure is nice to know you have it when you need it! doesn't mean a person has to use it all the time. But in the same token wait until the mods and motor work is necessary and budget allows!
for the time being wake it up with a 585 cam and some Sachs carb work is what the budget allow's.
bigkelk9
Well-Known Member
Basically John and the guy who did my work work together in one way or another because they will both swear by each other and their work. I bored my cylinders over, installed Carillo pistons, new valves and guides of coarse, spun dropped my heads, went with Cometic gaskets with .010 for base and .018 for head. According to S&S, that should put me between 145 to 155 horses, big dog gives u right at 115 horses.. on a motorcycle, that' a huge difference. I'm still getting great gas mileage and u can feel the difference big time when riding 2up as I do quite often. I mean 2 each their own, but I had a gnarly tick and upon inspection of my engine found other things that needed to be addressed, so while addressing those I figured I'm here and already knee deep in It, why put it back together without putting it how S&S intended for it to be. Again, just an opinion.. and about 1700 bucks.. lol
BWG56
Guru
I'm with ya on that one, I rarely ever go over 4000 rpm's. The 585 is an excellent upgrade and Bowhunters how to is spot on for under $200If i wanted a hotrod i would have got a triumph 3 R.. if coursse , this is just my opinion but all i do is putt around
john sachs
Well-Known Member
SE 103" bikes came with NO compression releases. Unless the bike has a bad tune, or you have raised the compression, you should have NO problem starting it. The SE cam that comes in that engine is easy on staters, bad on power. You have 2 choices : put manual compression releases in, or use S&S easy start cams.
Easy start cams are NOT available for single cam engines.
John
Unsprung
In the Potters hand...
Spoke to John yesterday about carb work. He knows these engines and how to wake them up. 585 would be my limit, got the Wife’s Hayabusa for the days I feel like “flying low”. I’ll be in Deltona this weekend, (John’s and Baddawg Bill’s town), and started getting ideas about going to see him.
john sachs
Well-Known Member
The MAIN reason to get rid of the EPA nonsense is to make the engine more EFFICIENT.
This means getting involved in the cylinders, and or heads, and changing the cam. While the engine is apart it pays to optimize the combination with a better cam, and carb work. Kinda like walking through the woods, when you're half way to your destination, you don't turn back.
Your EPA 117" engines come with compression releases that should never make starting a problem. I've got some heavy hitters with over 11.5:1 compression, and no problem starting.
John
This means getting involved in the cylinders, and or heads, and changing the cam. While the engine is apart it pays to optimize the combination with a better cam, and carb work. Kinda like walking through the woods, when you're half way to your destination, you don't turn back.
Your EPA 117" engines come with compression releases that should never make starting a problem. I've got some heavy hitters with over 11.5:1 compression, and no problem starting.
John
bigkelk9
Well-Known Member
That's kind of what I was told.. it's not all about just more power but also about efficiency of the engine as well as performance. How it's actually supposed to be is better for the engine.. the set up I had before I thought was pretty gnarly, but this is a whole new beast. And the 600 cam was only 99 bucks, lol, pistons and machine work is where the money fell. Bore the cylinders over by .050, new Carillo Pistons, new valves and guides of coarse, verifying the compression releases were working properly, I'll tell ya this bike has never started so easy and ran so smooth.
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francoblay1
The Spaniard
@pknowles
I copied most of the "How To" and saved them in PDF.
I do have the pictures....NO pics, I know your apron is on hold
I copied most of the "How To" and saved them in PDF.