Topic: Vesrah gaskets

[DaveBarbier]

What's the difference between MLS and CFM? Did you out a 650 in your 550 or is that actually a CB 650? I've been talking to calj737 about boring, porting, cam swaps etc..

+ Nothing in life worth doing is easy. CBs are very worth it!

It's still on the bench, but I'm putting a 650 motor in my 550 frame. Fun times

[AlekStooge]

Until yesterday I thought of going the same route but I found out it is significantly heavier not just 2 lbs more then the 550, like I thought. You can't use PD46C carbs right?

[DaveBarbier]

Until yesterday I thought of going the same route but I found out it is significantly heavier not just 2 lbs more then the 550, like I thought. You can't use PD46C carbs right?

Can't use the 550 carbs. That's a whole other rabbit hole. I'm using CR26's for mine.

As having lifted both engines I'll say that the 650 motor is not significantly heavier. A few pounds sounds right. I could be wrong though. You'll have to check numbers, they don't lie.

[AlekStooge]

MLS sounds like it's more work then I'm up for. I'd like to just put the gasket in with Hondabond, as recommended by you and cross my fingers.

[AlekStooge]

I think I'll call the shop and ask them to deck the head and cylinder block flat for an MLS gasket. I'm looking into getting this kit for a big bore. http://www.japbikespares.com/honda/honda-big-bore-piston-kit/honda-cb550-k-sohc-74-78-600cc-big-bore-kit-61-5mm-piston-rings-gasket

However I don't think that is an MLS gasket that come with it nor does it specify that it is a 0.038 thickness.

So trimming the dowels is a must if you go with a MLS gasket? How much more work is this?

[AlekStooge]

So it depends on how uneven it is in the first place because there no reason to take off a lot if it is close to flat.

[AlekStooge]

Yeah I told them that I'll be putting in MLS gaskets. We'll see how it turn out.