V35 PC (imola) engine and the 350 Nevada engine parts interchangibility

[Strom]

A question for the gurus..

I have an old V35, modified somewhat, but it does have an imola engine in it (with 24 dellortos... ex military methinks).

Anyway, it will not idle, it will no go beyond 111 kph according to the pushbike speedo, it will guzzle oil and fuel at an alarming rate.
The bike does not have many miles, but it sat for longer periods of time.
Anyway, I would like to get some cheap carbs somewhere (got a tight to non existing budget at the moment), but a friend mentioned he had cylinders/pistons from his Nevada 350 lying around (he made a conversion to 500, then sold the bike).

Would they fit the v35? A quick search of the interwebz shows same bore/stroke, but I remember someone mentioning that v35 I and V35II/imola and I dont know which other models engine parts should not be mixed up.... whats up with that?

[Pete Roper]

More detail required. What model and year V35 and is ithe Imola engine from a 2 valve per cylinder model or a 4 valve per cylinder model? The smallblocks have a lot more differences in things like crank throw and bore size than the big blocks and are a right frontbottom to sort out, especially the later carbureted models. I've just been bashing my head against the solid steel wall of ignorance and stupidity in someone's head over on Guzzitech with a right 'Rhymes with Runt' with a Nevada. No disrespect intended but Nevadas seem to attract wankers, numpties, mouth-breathers and cretins! None of whom I tend to suffer gladly so while I'll do my best to try and help please DON'T tell me I'm wrong without explaining why and feel free to ask as many QUESTIONS as you like without lecturing me and telling me you know more than I do, because, not meaning to big-note meself, but you don't!

Not implying that you fit any of those categories but just be aware I tend to growl at Nevada owners......

Pete

[Strom]

Pete,

I do not know about the others, but I find all the foul talk about Nevada (and other) owners rather... fornicatingly funny.  

Anyway, enuff bout the tards. Lets say the previous owners of this particular V35 were somewhere in the range of Baldrick regarding their mental status, sadly, they did not show any similarities in the humor region.

I assume it was an ex military V35. All papers say its 1984, but I wouldnt place much trust in that. Frame number was bodged to fit an italian homologation form number, so no luck there. Engine type is PC (same as imola), but the carbs on it were the 24s. It is a 2 valve model with points ignition.

The PO, lets indeed call him "Humorless Baldrick" from now on, got his hands on this bike, which was converted into a cafe when I got it and sold it on to him, and he also bought another V35 (first series, with the digital ignition), converted into a cruiser and with no papers.

From the two bikes, they bodged something together. Then it sat for some years and I bought it back for peanuts. Minus all the goodies (tarozzi rear sets, tomaselli throttle, etc from my "imola"... and frame/engnine of the second bike etc... which they threw in the trash - grrrr)

Anyway, the engine still says PC, the cylinders and heads are black, as they were on my PC engine as I sold it, so I assume the they didnt mess with the engine too much.

Since its spewing some smoke (enuff to be annoying if youre riding behind) I was thinking if I could replace the cylinders and pistons with Nevada ones, that a friend is offering. To his credit, he bought the best cali there is (IIRC from your text - hydro w/updates).

So, can I stick some nevada cylinders/pistons into a V35 Imola engine and have any chance it will work?

[Pete Roper]

The only thing that *might* be an issue is that the gudgeon pin diameter might be different making the swap impossible without swapping the rods as well. Early and later V50s used different gudgeons but I can't remember if this difference crossed to the 350's.

Pete

[Strom]

The only thing that *might* be an issue is that the gudgeon pin diameter might be different making the swap impossible without swapping the rods as well. Early and later V50s used different gudgeons but I can't remember if this difference crossed to the 350's.

Pete

Nothing a hammer, a can of WD40 and some duct-tape couldnt solve I guess... :P

[alphabet man]

 author=Pete Roper link=topic=63717.msg1467077#msg1467077 date=1306926950]
 No disrespect intended but Nevadas seem to attract wankers, numpties, mouth-breathers and cretins!and there was all kinds of mean nasty ugly
looking NEVADA people on the bench there.  Mother rapers.  Father stabbers.  Father
rapers!  Father rapers sitting right there on the bench next to me!  And
they was mean and nasty and ugly and horrible crime-type guys sitting on the
bench next to me. And the meanest, ugliest, nastiest one, the meanest
father raper of them all, was coming over to me and he was mean 'n' ugly
'n' nasty 'n' horrible and all kind of things and he sat down next to me
and said,

None of whom I tend to suffer gladly so while I'll do my best to try and help please DON'T tell me I'm wrong without explaining why and feel free to ask as many QUESTIONS as you like without lecturing me and telling me you know more than I do, because, not meaning to big-note meself, but you don't!

Not implying that you fit any of those categories but just be aware I tend to growl at Nevada owners......

Pete


 I don't know just reminded me of Alice's restaurant   I apologize to any Nevada owners  

[Strom]

Almost related question...

The v35 project is on hold... but a guy I know turned up and he likes the bike.
He can get me a T5 (ex cop bike, 8500km, looks good - as much as a t5 can - on pics, with all the fairings and stuff) in exchange.

What do you guys think... im not sure. I put quite some effort into the v35, but a bit more is needed. But then again, a T5 is more suitable for my riding style/cafe project. I have other bikes I ride, so this is not and wont be my primary ride for quite a while, if I do the exchange.

The 35:


Link to the T5 ad:
http://www.bolha.com/Ostali-motorji/moto-guzzi-t5-850-letnik-2002-in-samo-8-500-realnih-km-prodam-ugodno--oglas1273668776


Go for it or not?

How much PITA is to get a T5 some decent suspension and other stuff sorted out?

[Strom]

sorry for the big pic... no idea how to make it appear smaller....

[Strom]

Anyway, I decided to keep the v35, ordered new piston rings and all the appropriate gaskets and stuff.

It is a gen-u-wine army bike - or was at least. A friend rode his stock army bike to my place (with sirens and everything) and I did some comparing.

Anyway, his bike pulls to 80kmh with no fuss and quickly.... mine has to be begged and persuaded and then maybe can hit 80.
In any case, when the parts arrive, I will pull stuff apart and see whassup with my engine.

If cylinders are fubar, then I will check the nevada cyls/pistons option.

Meanwhile, I have this V35 and a 98EV. None of the speedos show the actual speed.
V35 shows way too slow (stock 180 kmh speedo... I think its stock...) and the cali stock speedo shows 5-20 kmh too slow.

Ive had the cali speedo apart a few times, fixed this and that, but I am just fed up with it.
What are the affordable options - apart from a pushbike battery powered digital speedo duct-taped somewhere?

I do like motogadget stuff, but not enough budget....

[Strom]

Update:

One of the points got un-riveted and had bout 1mm free play reeking havoc with timing.
In turn, the capacitor was a bit bloated...
Both components were new from stein-dinse.  
Replaced the capacitor with the old one and re-riveted the point.

Also, one of the rubber boots between carbs and cyl. head was torn. Weird as they were replaced by new ones by the PO... prolly a clamp was tightened a bit too much.

I gave my GF some tools and she took off the carbs, exhausts, heads, cyls and pistons while I drank some beer with friends (and no, you cant have my GF)  

Left head looks a bit worse than the right, but I got a spare off ebay. It should arrive today/tomorrow. Cyl walls look OK, still some honing marks, alltho I have no idea if they even honed chrome/nigusil bores?

Piston crowns show some debree damage, but nothing too bad. Pistons seem to be reusable.

Will post some pics if I remember to take them...

[Pete Roper]

The points system on smallblocks has always been vile. Regardless of your eagreness to maintain simplcity swapping to a Dyna 'S' system will mak a world of difference.

All smallblocks use Nicasil coating on their bores. Unless liners have been pressed in by a previous owner which is unlikely they will be nicasil. The way to be absolutely sure what the cylinders are lines with is witha magnet. Strong attraction? Iron liner. Slight attraction? Nicasil. No attraction? Chrome plate.

Pete

[Strom]

Thanks for the input, Pete.

I have been a good boy and cleaned the cylinders, pistons and heads yesterday. Forgot to take silly pictures coz I ran out of beer.
Anyway, the cylinders still show honing marks, but I didnt know whether chrome/nigusil lined cylinders were honed afterwards.
I measured the piston rings and were a "bit" out of spec. 0.25-0.45mm is the specified tolerancy between both ends of a piston ring when inserted into a cylinder, mine had 0.85 and 1.00. Glad I bought new ones

I will check into the prices of dyna ignition... and see what I come up with. IIRC dyna system uses stock mechanical centrifugal advance?

[Strom]

Update...

Replaced piston rings, heads, lapped the valves, set them and replaced all the appropriate gaskets and stuff.

Compression is now 9.75 on both sides.

Ignition timing is set and spot on, points gap is within spec now. The bike starts and runs fine.

Except again... if I accelerate to 100kmh (still takes a bit longer than expected), when the left carb runs out of fuel it seems.
The spark on that cyl is fine, but will not run on it until enough fuel drips in.

The gas tank was cleaned, another petcock added (had only 1 before), carbs were cleaned, fuel filters ommited for the test purposes and its still the same crap.

I asked a "local" guy, if he still has his leftover carbs from his nevada 350 (he converted to a single carb).

Meanwhile I am going to pull the bowl from the carb and see, if the fuel actually gets there in a normal sort of pace...

Luckily I have the cali to ride... but more bout that in another thread....

[Strom]

Theres the problem....
float valve seat gasket disintegrated...

[veefer800canuck]

Alcohol in fuel? Seals not rated for it?


Go Viton if you can get it.

[Strom]

We got the crappy 10% ethanol fuel... could be, or maybe the gaskets just werent made to hold fuel.

Replaced with o-rings (all I had handy, will replace with copper/alu washers) and used some loctite on the threads.

A friend popped by with colortune and we lowered the needles... the bike runs almost perfectly now...