Topic: head porting

[Captaindonutbikes]

Just getting down to doing some magic to the head.

so enlarge the exhaust by 2mm and the intake or just exhaust side?

obviously lots of smoothing but anything else ?

pictures opinions and advice greatly appreciated  

[Old Scrambler]

Lots of advice already archived....search.....and tell us what motor

[mlinder]

typically, you will gain more performance from work in the intake side. Especially on these old sohc4's.

However, it only takes five minutes and a dremel to completely screw up a head, whereas it takes years of experience, knowledge and a patient, steady hand to squeak more performance out of one.

I don't do headwork. I leave that up to the professionals, like Mike Rieck.

[camelman]

I'm with mlinder on this one.  Unless you are a professional, or have really steady hands and an amazing amount of patience and mechanical aptitude, you should leave this type of work to those with experience.  MRieck seems to know his stuff.

I bought a spare head to practice on.  It ain't easy.

Camelman

[Captaindonutbikes]

550 and i have loads of patience.
 

[mlinder]

Hope you have loads of 550 heads too.

[camelman]

Sweet, I'll be awaiting instructions on how to do mine correctly.  ;-)

Good luck, and let us know how it goes.

550 and i have loads of patience.