Looks good man! What drive belt do you use for that?
Is it the DBR carter?

Interesting findings Arvid! Perhaps most of my vibrations come from the 12,5 compression I have. 🙂

Designing a combustion chamber is far out of my knowledge and is a science of its own. I would need remove 0,6ml of volume and I’m not sure how much material there is to work with inside of there.

I guess they are Okey, but not perfect. 🙂

0,6 in Squish will give 1:14,00 compression ratio
0,8 in Squish will give 1:13,23 compression ratio

The Malossi DEPS-2 have 1:13,5 something..
But it all depends on how I elaborate with gasket thinknesses, in some cases the cylinder rises, which will give other positive effects on port timings.

Using…[Lees meer]

Updated once again, still in search for some parts!

Okey, I managed to measure the CCV.. The test isn’t the most scientific but I did my best.
It was hard to tell when I had reached the threads for sparkplug but something around 5,4ml oil, perhaps 5,3 was the limit but I missed it.

If I’m not incorrect, the compression ratio would be 12,56 (5,4ml) and 12,77 (5,3ml)

So what can we conclude…[Lees meer]

Thanks for the Input Arvid, I have read that thread  a couple of times and I have misunderstood Zevens question. my 12,5kg/cm² is just the compression.. (showing no leakage in rings, gaskets and so) It isn’t the compression ratio that is relevent to the question. 🙂 So I make, what we call in sweden “a poodle” in this manner.

I have read and u…[Lees meer]

Hmm, I don’t think I have detonations.. Haven’t heard them atleast but I might not be able to tell the difference.

My compression is almost 12,5 Kg/cm² (measured with open throttle, and using the pedals like a tour the france race)

Edit: I took the flywheel off and grinded it a bit like @Jelle needed to do, the key wasn’t riding smooth. However…[Lees meer]

Thanks guys!
I got the head gasket today, it was 0,4mm full-aluminium gasket (not alu-coated copper-gasket).
So tried out with this gasket + 0,5mm cylinder gasket, giving me 1mm squish.

Experience:
1. Compression is high (haven’t measured it, but it much higher than before, thats for sure!
2. vibrations, vibrations vibrations.. They have…[Lees meer]

Sucess!! The kop fits like a glove and centres perfectly. 🙂
Even though my caluculations wasn’t 100% I’m still in the ball park!
I only measured a 46mm Polini head gasket, and it was 0,5mm, I have ordered 43mm gasket and only assumed it would be 0,5mm aswell. Perhaps it’s a bit thinner? Or soft meterial that reduces 0,1 or something:)

When you…[Lees meer]

If im not incorrect, only 0,5mm Base gasket and 0,5mm head gasket.. The top will protrude 0,2mm inside The cylinder. So the timings should not be affected that much.

Lets pray this will work, and there is no motherload of compression. According to calculations the squish should be 1.0mm

Yeah, something like the Evoten.. However this should be a daily driver, so I’m trying to not elaborate that much otherwise it will be sitting in the garage all summer 😀
I’m thinking about only to maal the top, to compensate för thicker base-gasket and head-gasket that will be added and leave the rest as is.

Yes, it’s all strange.. However I’m Confident that this is the correct head but someone mixed up the numbers in the casting. Because I only have 41mm in diameter of the chamber, that would correspond well for a 43mm head.
As for the off-center, I noticed as you stated, it’s possible to pivot cylinder and head to get a better match.

Unfornunatly,…[Lees meer]

WTF … I think JMPB might have sent wrong cylinder head.. I ordered 38-43mm, but I thin it’s 46mm based on numbers on casting.

Edit: The package says 211.0226 (38,4-43mm)
The casting says 21.0227 (46mm)
The diameter of the chamber is 41mm, so I think it’s correct head, however it’s really off-center.

Took down the engine to install the pinasco flywheel!

Nice squishband on the polini head, they really know how to make good quality products! *NOT*

Updated, still in search!

Thanks! 🙂

I’m pretty sure it’s not the brakeshield/remnaaf because the more I tension the brake cable the worse it get.
If I tension it that much I would want, to have a pretty stiff lever, then the wheel will stuck at this precise part of rotation. (by hand)

Either the brake shoes needs to brake in, or there is something else.
I hade noted…[Lees meer]

New Continental rubbers mounted and the varionaf too..
Gonna install the Pinasco Flywheel aswell before I complete it.
The front brake seem to grab at certain place each lap.. I think itäs because the Moparts front wheel bushing is tiny bit larger than the axle, so it’s not really centered.

I can notice that the pads are glued different from the original..
Don’t know about Polini or Ferrodo if the are glues the same or different.

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