rockers -spacers

punchbuggyracer Seriously Crusin Dubber

152 posts · joined Apr 2006 · 8 Dec 2007, 7:43 pm

#623962

Im putting together an old 1835. Ive had the heads resurfaced for a good seal, one was corroded so a had another one machined up. From memory the new one had to have about 8mm fly cut out to make them the same. The ports are stock and I CC'ed them at about 42.5cc.

Heads are back on, put the rockers on and damn it the adjusters are already at their max I still need close to a millimetre to get them with in tolerences. I originally thought the push rods were stock. I dont have another one to compare it to, but I now suspect its been shortened and by to much.

Can I machine the rocker mounting blocks to bring it back down to the right height? Or do I need push rods that I can trim down eg Empi, if so how much.

Cheers

Street N Park The experts in dialling scooters

hellbugged 48's and straight cuts

5,080 posts · joined Apr 2003 · 8 Dec 2007, 9:47 pm

#623969

better off with another set of pushrods..........

machining (or spacers) on the rocker "pedastal" will effect the geometry of the rockers on the valve tips. pushrod to rocker geometry will also be outa wack

around $80

1303Steve Scirocco Rare

8,650 posts · joined Aug 2002 · 8 Dec 2007, 10:20 pm

#623973

Hi

Make yourself an adjustable pushrod so that you can get the correct size pushrod made. You can fit a spacer under the rocker posts, but you can only go a small amount before it all turns bad.

To make an adjustable pushrod, get an old stock one. Cut it about 25 mm from the end, then cut another 25 mm off the long piece of pushrod that you have left over. Drill and tap each peice to 6 mm, then get a piece of 6mm threaded rod about 50 mm long, screw it into the short bit of pushrod untill stops, attach the long part of the pushrod, now you have an adjustable pushrod.

Steve

punchbuggyracer Seriously Crusin Dubber

152 posts · joined Apr 2006 · 9 Dec 2007, 10:52 pm

#624059

Yeah I thought as much, I've read it in the 'How to hotrod a Volkswagen'

This budget motor has cost me more than the car. I was hoping it could have a budget fix.

Street N Park The experts in dialling scooters