SA50 upgrades

[lilredspree]

Sounds good. I'll pick paper up in the morning and post results then. Should I shoot for getting my intake close to 127?

[bakaracer]

Exhaust duration:170
Intake duration: 118

I like that 170 exhaust duration for the street but that intake duration seems a bit low. it should be around 124deg.

[bakaracer]

Sounds good. I'll pick paper up in the morning and post results then. Should I shoot for getting my intake close to 127?

that will make your exhaust duration to high. with that thin gasket paper,that should put you at about 123deg in and 175 on the exhaust. which will still be pretty good for that pipe. if you add that base gasket, you can run the 1 head gasket. that will put you right at the limit to run pump gas. you just have to double check the squish after you put it back together.

[lilredspree]

Woops. Just remeasured. I was 5 degrees off on my intake duration. Intake duration is actually 123.

[bakaracer]

Woops. Just remeasured. I was 5 degrees off on my intake duration. Intake duration is actually 123.

double check the exhaust again and make sure its 170. are you bolting down the cylinder when your checking measurements?you have to have the cylinder bolted in place without the head on to check the duration.

[lilredspree]

cylinder was bolted down. recheck anyways

exhaust: between 170/171
intake: between 123/124

[bakaracer]

cylinder was bolted down. recheck anyways

exhaust: between 170/171
intake: between 123/124

yeah get that thin gasket paper. that should put you port timing closer to where you want it for that pipe you have. with that extra gasket you can run it with the 1 head gasket and you should be fine. get yourself a cht gauge to help you with your jet tuning

[lilredspree]

Will do. Have a trailtech headunit with temp guage.

[bakaracer]

do you have the trailtech vapor?

[lilredspree]

trailtech vapor stealth

[bakaracer]

trailtech vapor stealth

ah yeah the black one. good so you have rpm,mph and temp. perfect!!! all what you need to dial in that bad boy.polish that exhaust port and the head so carbon doesnt stick to it. carbon build up will mess with the flow.

[lilredspree]

Thanks for your help baka. I'll get back to ya after initial startup and see how she runs! Going to start a build thread once things get back from powder hopefully tomorrow.

[bakaracer]

do your heat cycles before you start riding it. alot of guys on here seem to get the misunderstanding that heat cycles are when you ride the bike and let it cool down. its not. heat cycles are you let the bike idle till it gets hot anything hotter than 150deg is fine, then let cool to the touch, then repeat all over again. I like to do at least 7 heat cycles before I start to do the riding breakin.

[lilredspree]

Did my heat cycles and Ive been doin just some easy riding on it. Motor is getting super hot. I'm either crazy and suck at jetting (basing mainly off running temps right now). First ride never took it faster than 25. Temps hit 300! so I brought it home. I do live in a fairly hilly area which makes this tougher. Gone for quite a few rides now. Have upped my jetting to 160/55. I feel like its too rich just by the numbers and what i've read, but I'm still seeing temps with spikes up to 270.
Compression is at about 120psi. Weird thing with all this is it wants to cruise at 35mph (between quarter and half throttle). if I go past half throttle or try to push past 35 it starts sputtering/losing power. Has done this on all my jetting trials. Maybe an air leak somewhere?

[bakaracer]

300 is not hot. If your near 400 then worry. What kind of oil are you using and what's the ratio at? try and lean the needle. Move the clip up. That should help clear that sputtering your having mid throttle. You can also turn out the air fuel screw to about 1/2. You should have it at around 1 3/4 to 2 turns out already.