I bought a 99Dyna a while ago. The guy I bought it from told me it was rebuilt 500ks ago. He was going to get back to me with more details but never heard.

So, I'm not 100% sure what's in it, without pulling it down, but this is what he told me. 1700 & something cc, so I guess 103 - 106ci?. Wiseco Hi comp pistons, but he wasn't sure what the CR was. Andrews touring cams, but again, no cam card or figures. Hooker pipes.

He told me that the guy that did the engine said it would need a bigger carb, so I'm trying to figure what to get.(It still has std carb on it)

I've been looking at S&S Super E & G carbs, and Mikuni HSR 42 or 45.

I'd just like to hear other opinions on these. I know if I go the bigger carbs, I'll need to change manifold as well, but thats OK, if thats what it needs. I was thinking of getting full kit, manifold, carb, air cleaner etc, if I buy one.

Do the Mikuni's have an accelerator pump?

Atm, the bike seems a little lean on cruise at about 60k in 3rd, getting a pop out the carb now n then.

 

Set your stock carb up properly first then if you feel you need to go big go for a bigger stock CV carb, i think screaming eagle do one. mikunis are a little better than S&S but then again i don`t rate S&S, only my opinion.

 can you find  out of the guy who built it what's in it  , but if it is how big you say it is 1,700 c.c.   a G or 45mik  both have acc pumps as per the stock 1,   but  don't ride it if it is lean  you could cause damage esp on a hot day 2 up, clean &  tune  that 1 our spend $ 

I can't get back onto the guy I bought it from, and haven't a clue who built it, Makes it hard picking parts when I'm not certain + have built chevs for years, so trying to get my head around Harleys now, and what works best etc.The only way I'm going to know for sure whats in it now, is to pull it down and measure everything, which I haven't got time to do. So I'm just using the bit of info that he did give me, and hope it's right.

Usually when I set up engines, I find the safest way is , if your undecided on what size carb, it's better to err to the small side, as at least you will still have good throttle response and drivability, even if you lose a little top end HP compared to what you would get with the bigger carb. But if you go too big, then they can become a bit of a pig until the rpm gets high enough unless you can tune it spot on to suit.

It might sound like I answered my own question, but I'm trying to figure how tunable these carbs are. I figure if the engine is the size it's supposed to be, I'd rather go for the bigger carbs and tune from there to get the throttle response etc. On V8's I've run carbs that are pretty big and still been able to tune them for good drivability etc. But as I said, I'm just learning about Harleys(bit of a different ball game), what they like and what I can get away with etc.

Thats about why I was asking peoples opinions of the different types and sizes, I guess also what size engines they are running them on.

mmmm really the best thing is buy some gaskets an look inside yaself .. some ppl bullshit just to get a sale an as ive done for heaps over the yrs pull her down an look its easy in bike to take heads off an to take nose cone off to check cam once heads off do as ya do to check a car an have good look at heads if valve guide mound is nice an round with factory rough casting ya know it not been touched as for carbs mikuni are best in my opinion as they have more tuning options an work well all round s&s were designed way back as a drag or salt carb only they have refined them heaps but i always go the mik

mmmm really the best thing is buy some gaskets an look inside yaself .. some ppl bullshit just to get a sale an as ive done for heaps over the yrs pull her down an look its easy in bike to take heads off an to take nose cone off to check cam once heads off do as ya do to check a car an have good look at heads if valve guide mound is nice an round with factory rough casting ya know it not been touched as for carbs mikuni are best in my opinion as they have more tuning options an work well all round s&s were designed way back as a drag or salt carb only they have refined them heaps but i always go the mik

Yeh, I know I should pull it down to check it out. I just haven't got time. I've got 3 other race engines to finish building, + 4 cars to finish, in between all the rest I've got to do. I bought the bike so I could go for a lap and relax for a bit. So, thats why I'm just hoping that what I got told is right. One day I'll get around to pulling it down, but it's not gonna happen soon.

Regardless of what motor you have, the Mik 42 will still work OK, and very tunable.
You could as easily run the 45, but you will need the SE inlet manifold to suit it though.
I really doubt the motor is up around 1700cc .

Yep, I won't be surprised if whenever I do pull it down, it's not that big. All I can go on is what I was told atm. Thats why I'm trying to find out whats best to tune etc. If I was sensible and take the easy way out, a 42 would probably be best, but then I'd hate to think I missed some HP if the engine is what it supposed to be and I could've used a 45.
The Mikunis are beginning to sound the better choice. What are the factory manifolds like. I don't mind if I have to spring for a new manifold if I go with the 45. If I go for a 42 is it a bolt on job with the factory manifold. Also do I need a different air cleaner or is the std one OK?

The Mik' 42 will fit with the stock manifold, but for the 45, the easiest is to use the Harley SE (Screamin Eagle) manifold
part#29635-99 . If your A/C is stock, you are better off replacing it with a better breathing unit, either HD or aftermarket.
You also need the Mikuni A/C adapter, but that will usually come with the Carb kit.

Thanks for your help Speedzter.
Do the original cables fit if I go for the 45 and manifold?

if ya use the 45 the standard manifold an adaptor drops down a fair bit i make manifolds to suit 45 mik so ya keep ya flow they easy to make outta a 45 mandel bend an some tube i make em in black mild steel then powder coat em make em for shovels to so a mik slips strait on ..easy way i spose is slip carb an manifold off an you bein a engine (car) builder should be able to tell by feelin inside the posrts if they been tickled up and if ya got 20 mins do a il change same time pull nose cone after ya dump oil an have quik look at ya cam ..that the quikest an easiest way to tell if she been touched up a 42 mik will be able to be tuned upto 103cubes an will work pretty good with standard manifold ..personally if ya got manifold off give it a hit with some 120grit so she gets rid the casting marks an itll give it bit better flow an mix on way to the heads .. cables will fit most times but not every time hey but they can be adapted easy too

The cables will fit no prob's on your '99

Thanks Ol skool.
I have been looking around. Can get 45 mikuni full kit with manifold, air cleaner, small parts for fitting etc for $640, delivered.
Or 42 kit with adaptor for intake for around $400. Your right, I guess it wouldn't take long to port the std intake. Pretty easy to get into.
If I can get some time when I go home from work, I'll check the cam so I can figure what size. They don't seem very big, and the guy told me they were Andrews, touring cams?

I'm probably worrying about it too much, as it's never gonna get raced. But I like things going how they should, and when I hit the throttle, I like to feel like it's got something decent hooked on the end of it.

Hey Sandman relax and remember that you have joined the Harley family now,
your not riding a wiz bang European, British or Jap sports bike, working out
what exactly you have bought is half the fun of owning one, the other half is keeping
it running so you can enjoy it.. like has already been said Service, Adjust and
Tighten everything, Dyno tune and rejet carby, Have young girl in bikini wash
and polish bike while you consume 2 light beers, then RIDE THE GUTS OUT OF IT !!!

i 've ridden a lot of differant EVO's ,  & you could tell just by riding  her  if she got a biggen down there below & how she feel's  etc , hot -up EVBT - 80 are a big differant than a stroker 'or a big bore , another way would be to put it on a dyno for a tune anyway  soft @ 1st , & you could tell by the feel & result's if she's   big or not,       EVBT-80 is anywhere from mid 60's to 75 HP       good 1 is 75-90 HP  , stroke  & big bore would be differant in there delivery + more HP  + early  T  etc ,  if you know V8's  M8 then you know what i mean by the feel