DR130 pep up

[sdjohn]

Thinking of pepping up my DR130 a bit. I used the stock crank and never port matched. What kind of crank do you recommend, should I open the intake, port the cylinder at all, etc? I am just looking to make a bit more, not a race bike. Thanks.

[sdjohn]

Also any idea what the port timings on a dr130 run? And what is stock intake timing with the primavera crank?

[vespistazd]

I matched the cylinder and intake manifold(polini 24mm manifold) with the cases and run a Mazzuchelli racing crank for rotary engines...good setup for some extra power and also reliable so its not a racing machine👍

[sdjohn]

Yes, that's along the lines of what I was thinking. I'm undecided on cutting the stock crank or just getting one of the Mazz racing ones. I'm running the polini CP21 carb on a stock manifold and Polini kidney style pipe right now, probably those stay. I'm open to raising the exhaust port or widening it as well, if it will serve the cause a bit.

I found this thread with some port timings:
vespasmallframeforum.proboards.com/thread/20897/talk-me-port-timings


It seems it could use some more exhaust timing and blowdown timing.  Easy enough to take the port upward if it will help.  I'm not so into the packer idea on this engine as I will then be forced to go get some material milled off the top of the barrel.  I'd rather have at it with a dremel.

[vespistazd]

Ok...i am not much into that timinig things so i went for something that is allready been tried out and tested so i didnt need to calculate anything👍

[sdjohn]

Yes a lot of folks do, nothing wrong with that but I’ve caught the dremel fever over time...

[sdjohn]

I see that basically the moment I get into this, I'll be wanting the ETS crank, and that will kill my points stator and flywheel. What do you all think of the SIP Vape ignitions? It looks like the most reasonably priced way to deal with the situation....

[vespistazd]

The sip ignition looks very nice and i saw plenty of people using it so i think it cant be bad...

[tzsteve]

ive used 125 and 175 on a lot of engines its a nice safe start
and a bigger inlet port don't cut the crank
if you are fitting an ets type crank cut the crank as well ( 190 to 195 total inlet timing )

nice and cheap and reliable enough

but a decent pipe and carb are always a good investment if funds permit

[sdjohn]

Thanks tzsteve, just what I was after. I have a the choice of Polini kidney style exhaust pipe or Zirri Silent. I've got the big battery box (100 sport style for those not familiar with US bikes) and not keen on cutting it out, so pipe selection is limited. I'm leaning towards the ETS crank but the cost of switching to electronic ignition is giving me a bit of pause, as well as that crazy fly side bearing situation. Either you pay a fortune for the split bearing or you use the conventional bearing, but I'm not sure how you fit it - crank first and then heat the case right before mating?

[dazzz]

VMC do a cheap fancy ignition. But you could always use the PL170 flywheel and standard stator they are cheap. You don’t have to use the ETS crank just get a 20 come crank and use the normal bearings.

[tzsteve]

I am running VMC no problems I changed my whole system to 12VDC
use the ETS with the cheap conversion bearing but you need to fit an old axle circlip behind the bearing to act as a spacer plus a different oil seal all easy stuff


the bearing is a cheap one sorry I cant remember the number at the moment ( I have a flac case that takes the same bearing as a Lambie )

the cost of swapping to the vmc flywheel is well off set in terms of reliability and better acceleration

link to ebay 20mm cone version
ther is also a version for the 19mm standard crank


this could be your xmass prezzie to you form you

[sdjohn]

The VMC seems a bit tough to figure out how to order to the states, the BGM and SIP have good dealer support here so I’m leaning in that direction. I know the BGM is not the top of the line but the CDi’s and pickups and such will be much easier to come by over here as well, so I’m thinking on it.

[tzsteve]

most of the BGM stuff is very good
I guess most imports to the states will be a bit heavy on the import duty
if we import from the states anything over $20 is 20% extra plus a rip off handling fee from the carriers

[sdjohn]

Yes the way I usually approach is to order sip or sck from a USA dealer, there are a few that tack on a small charge but no duties or customs to deal with, they deal with that for you.

[sdjohn]

Do I still want or care about a cut crank if I go with intake reed?

[tzsteve]

no.
you blend and open out the inlet around the inlet port as big as you can
but try to aim the inlet toward the centre of the crank between the webs

but if possible you do want the ETS crank with the 20mm cone
a kit like the one you plan to use with a reed would be fast enough to snap a standard 19mm crank
we in the uk go to stoffis garage in Italy.
these are the genuine piaggio item and nobody in Europe is cheaper for these cranks

do you have any Italian speaking mates his English is limited to "no I don't speak English"

[sdjohn]

Cheers for that, sck have some Piaggio stock, not cheaper but probably better quality than Mazz.

[sdjohn]

So if I wanted to use a 20mm crank, is this good enough? Do the 20mm cranks use the same as the 19/20 earlier cranks? I think so but not sure. Looks like most standard stroke full circle cranks are 20/20, not the ETS style. I'm considering using a Malossi 135 iron kit and running direct intake. What are the differences from MK2 to MK3 to MK4 versions?