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Post by fredperrybruce on Oct 25, 2014 16:18:40 GMT
DOES ANYONE KNOW IF I CAN USE A STANDARD 3 PORT 125 BASE GASKET OR WILL I NEED TO BUY A DR 177 ONE FOR MY DR KIT. CHEERS  |
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Post by vespasco on Oct 25, 2014 16:27:45 GMT
I dont have a dr kit myself but the best way to find out is to fit it all with a standard gasket. Torquedown head. (Dont use any gasket paste as you will no doubt have to dismantle it again). Check how well the ports line up with the top of the upper most piton/ring. I deally the top piston ring should be pretty level to the bottom of the exhaust port (look up the exhaust port)! Check your squish. Doing all this will help give you the ideal base gasket thickness.
You may also need to match the ports on the gasket and cut them yourslf.
However, others on here with a dr kit will hopefully give you a better,more straight forward answer!
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Post by rab on Oct 25, 2014 16:30:35 GMT
yes you need the dr gaskets for the dr kit
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Post by vespasco on Oct 25, 2014 16:31:44 GMT
There you go  |
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Post by fredperrybruce on Oct 25, 2014 18:27:43 GMT
Cheers guys!!
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Post by sbwnik on Oct 25, 2014 21:47:18 GMT
Umm, no you don't.
Standard P125 base gasket. Place a thin layer of grease on both casing and cylinder faces. Assemble onto studs, but don't tighten down. Remove the cylinder and gasket. Any area that doesn't have grease on needs trimming out with a craft/stanley knife to match the ports, but on a DR I'd not expect that to be the case. I used to do this for a tuned Polini engine, there should be plenty of meat on the gasket.
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Post by rab on Oct 25, 2014 22:15:04 GMT
or you could just get the right gasket ?
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Post by pxguru on Oct 26, 2014 4:03:04 GMT
Or you could put on about 5 or 6 standard ones (all trimmed as Nik said) to make 1mm thick and then at least it would go properly  |
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Post by sime66 on Oct 26, 2014 8:17:56 GMT
Or you could put on about 5 or 6 standard ones (all trimmed as Nik said) to make 1mm thick and then at least it would go properly Curious again now...starting a thread to try to unravel these clues. |
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Post by henri on Oct 26, 2014 9:53:16 GMT
ya can as nik says trim n fit the paper gaskets ,but def need to check squish after ,as pxguru says a slight highering of port timings can hit a sweet spot ,but that needs careful measurement an experimentation , the dr base is paper an if memory serves bout .4-.5mm thick an most advise says stick 2 on with sealant between ,which gives you pxguru's height rise . but whichever way you go ,an i'd advise sticking to the 1 dr base gasket ,no 2 engines are identical an you need to measure n check your engine before randomly switching gaskets hunting a quick fix ,your more likely to either get a flat tune or even damage ya engine that way .
whichever one ya get do as nik advises n make sure its matched to cases n barrel or its just going to kill the airflow an give a flat motor, H
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Post by vespasco on Oct 26, 2014 10:33:32 GMT
I d always prefer 1 thick gasket as oppossed to lots joined together... Using 4 gaskets for example would give you 5 potential places for a leak.
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Post by sime66 on Oct 26, 2014 10:42:04 GMT
Now then, chaps; you've got me wondering now too. When I did my rebuild I used the metal base gasket that came with my SIP 'Piaggio' engine gasket set. It was identical to the old one I pulled off (which I still have), and it matched the engine and barrel perfectly. That bit seemed simple at the time; I don't think I even questioned it before doing it because it fitted. But I didn't, and haven't ever in fact (yet), checked my squish. This squish malarkey is something I'm going to look into now, starting with measuring what I have now. I have a feeling though, that FPB will have already finished his, and moved on to breaking a different bit |
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Post by vespasco on Oct 26, 2014 13:08:04 GMT
Why guess the thickness of the base gasket??? Fit it dry, measure it (exhaust port/top piston), measure squish at the same time, adjust accordingly.
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Post by fredperrybruce on Oct 26, 2014 14:38:09 GMT
Henri you said paper gasket! I pulled off a metal one when stripping the engine . Not to say metal ones right but it's making me wonder if that's another bodge from previous owner.
Am gonna order new gasket and rings this week from SIP .
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Post by henri on Oct 26, 2014 15:45:29 GMT
they can be either , i know the stock ones in gasket sets are metal , havent run a dr177 kit myself but the 135cc ones def come with a paper an metal gasket ,so you can choose which or even run both ,
an sip will stock em ,but so does dr in italy an often postage aint to bad , for instance when lookin for my 135 kit the price in england was about 110-115 ,from sip 105 plus post , or direct from dr 70 +10 postage , mind you google translate dont seem to like italian tech-speak where as sips site is clear n easy , try askin bout the gasket on there forum its given me some good tips/info before , aswell as some tuetonic thoroughly boring cobblers that even makes my posts seem brief , H
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Post by vespasco on Oct 26, 2014 17:21:21 GMT
Wow! Thats the first time ive heard anyone compliment the price and speed of italian post!!
But yeh, look around... Ive been looking lately and found a pinasco 225 kit (from italy) with pinasco 60mm crank and newer head for less than the price of the cylinder kit in some shops in the uk, with useless old style head and no crank!
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Post by sbwnik on Oct 26, 2014 21:29:05 GMT
Polini use the same thickness gasket as Piaggio. I'd put good money that DR do too. The trimming thing takes about ten minutes, and means you can pick one up anywhere.
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Post by fredperrybruce on Oct 27, 2014 20:13:43 GMT
Cheers for the advice guys if it wasn't for needing the new DR piston rings I would have tried the trimming method, but as I'm ordering the rings I might aswell buy the gasket to match from the same online shop. Shame I can only find the rings in SIP and not anywhere else. "Bloody expensive postage"
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