Alright I need some professional knowledge to be brought to the table. I can take a motor apart and put it back together but I need confirmation on a few things that I know many of you know off the top of your head. Just got done putting my 61x back together with brand new stock cylinders and pistons. My question is: was it a bad idea to run the ada non girdled oring head with 34cc domes on this stock motor. And do I have to run 98 octane? And what kind of compression should I expect? Guy I bought it off of had no idea what he was talking about and it never ran right up until compression dropped and I pulled apart. Also has a b pipe. Just need this confirmed so I don't go messing anything up. Thanks alot in advance
61x Motor Build Knowledge
- Thread starter Trever Oakes
- Start date
- Location
- Reno,NV
ADA Website 34cc 95 Octane 192LBS
I have been running non girdled for years now but 35cc 185LBS 91 Octane , I doubt that little raised compression will require girdle kit as long as everything else is tight.
Make sure to get your jetting right the B- Pipe will come to life with the raised compression.
I have been running non girdled for years now but 35cc 185LBS 91 Octane , I doubt that little raised compression will require girdle kit as long as everything else is tight.
Make sure to get your jetting right the B- Pipe will come to life with the raised compression.
Freakrider
X247
- Location
- Tampa Bay area
BruceSki
Formerly Motoman25
- Location
- Long Island
I’ve run 33cc domes on 93 octane @ 40:1 for years now. Just make sure you get your midrange jetting right.
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bored&stroked
Urban redneck
- Location
- AZ
My wifes 760 runs ada head at 190psi with 91 octane for years now as well. Its all about not giving it full throttle for very long at all.
Not running a girdle on a 61x cylinder is asking for trouble IMO, I won't do it,
Not running a girdle on a 61x cylinder is asking for trouble IMO, I won't do it,
BruceSki
Formerly Motoman25
- Location
- Long Island
I missed that. Definitely need a girdle kit. Ask all the guys with cracked cylinders why.
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Even on a stock cylinder I will have issues?
BruceSki
Formerly Motoman25
- Location
- Long Island
Milled stock heads to 175-180 crack cylinders.
Maybe you’ll get lucky and it won’t happen. 61x cylinders are cheap now anyway so try it out.
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Maybe you’ll get lucky and it won’t happen. 61x cylinders are cheap now anyway so try it out.
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bored&stroked
Urban redneck
- Location
- AZ
Protec half girdle is like $100. Run it.
Where do I buy one of those? I'd rather be safe . It's a brand new cylinder.
bored&stroked
Urban redneck
- Location
- AZ
GroupK offers them on their site. I got lucky and my ski already had a full girdle that I cut down into a half.