An Idea to fix my bike come on Guru's I need your help

[mattcfish]

Now you're starting to make since. A bad set of heads isn't the end of the world. That's why bikes are better than women. They can be rebuilt when performance drops.

"I'll get me wife to call and speak to them maybe answer my questions"

Does your wife have a cooler head? She'll actually help you fix your motorcycle.....? You're a lucky man.

[Motorhead]

Well I hope so
shes hard of hearing But does well on the phone

I'll send it to her like this

Number of shop

Hi I'm addressing my Husbands BMW its a 900cc with heads he sent a Email to and you responed to

Whats the cost to replace 1 valve seat? ..............Answer

If the valves and springs pass inspection whats the cost to reseal?............. Answer

if they need more work can you call and let me know especally before doing anything of any added costs, so I can discuss it with my Husband so he can deside how to process or stop

can he drop off the heads on Saturday?.........Answer

He can pick them up if ready next Saturday

Guru's if you all think this is good Ill do it

THANKS

[Deleted User 62]

Lyman, give a call to Rob Grauer who posts on this list, as he is THE BMW head guru and lives in San Jose. Fast turnaround and he won't let you down.

[mattcfish]

Lyman, give a call to Rob Grauer who posts on this list, as he is THE BMW head guru and lives in San Jose. Fast turnaround and he won't let you down.

+1

[Motorhead]

I have a Rob Gruber Tranny in my BMW

and I send my Heads to Mark De Groffs cylinder head service and machine shop in Northridge Lots of local BMW customers go there

330.00 out the door 2 harden exhaust valve seats and a full inspection and re-seal and clean up he was amazed at how clean my heads were

I use Chevron 91 techtron gas and Castrol T3 20W50 Dino oil

[Motorhead]

Picked up my Heads tonight from the Machine shop about an our ago, Mark is a real nice fellow

the heads look good, He gave me the old valve seats

Lookin foward to see how much compression I have, after all the fuss

330.00 for the work and parts, 2 hard exhaust seats and new oil seals and handi work..........

Mark De Groff

Cylinder Head and Machine shop 818 701 5274

18736 Perthenia Northridge Ca 91324

[Motorhead]

Installed and rideing Hummmmmmmmm

compression didn't come up to expections hummmmmmmmm

[Ken in Oklahoma]

Installed and rideing Hummmmmmmmm

compression didn't come up to expections hummmmmmmmm

Well, earlier you indicated that you had confidence in the person who you were going to have do your heads. And now the compression still isn't up to snuff. Unfortunately, as Major Softie indicated, that's an expensive way to trouble shoot. But the good news is, if it isn't the heads, then there's only a few things that can cause low compression.

What is the history of your piston's, rings, and cylinders? Those are the most likely culprits. Have you tried oil in the cylinders to see if it is a ring sealing problem? You're riding the bike. Is the power down from where it should be? Are there any signs of oil burning? Is there any chance the valve timing isn't right? What are the actual compression figures for both the left and right cylinders that you're reading?

Tell us again about the history of your problem with as much detail as you can.

I'm not likely going to be the guy who diagnoses your problem, but there are others here who are very competent. Feed them all the information you can, such as answers to the above questions, and you'll be putting them in a better position to help you.


Ken

[ME 109]

What's that humming noise?

[mattcfish]

Save yourself a lot of head scratching and do leak down test if you're sure it's compression.
http://www.motorcycleproject.com/motorc ... kdown.html
I built something similar to this with cheap hardware store parts.