Harley carb upgrades?

[awayatc]

I am thinking of getting a Mikuni HSR 45 for my 88 TC Heritage...
According to the write ups it increases HP a fair bit....
if used with free flowing pipes 25% over stock is claimed.
Just wondering if anybody here has any experience with with any of the carb upgrade options...

[admenk]

Thought about this as well for my '91 Softail. Either a Mikuni or S & S. Problem is that it's not' cheap, and in the end, with me being a tight arse, I thought I'd just keep standard carb and change the air filter. Mind you, I'm no Harley expert and I only potter along anyway, and if I wanted performance, I'd buy a different bike for a lot less ! Be interested to hear how you get on though.

[BIG DOUG]

I presume your bike is still 1450cc's if so a 42mm would be good I only use the 45mm on motors over 1550 with good heads and exhaust, filter and cams and ign on my 100ci dyna I run a 45mm my mate jason has a 131ci mtr and runs the 48mm mikuni.

[awayatc]

Yes, motor is still stock 88......
Just that there is a 45 for sale at the moment for a reasonable price on Trademe
If not I would indeed go for the 42mm .......
I have only put a K&N filter on mine, and the exhaust isn't standard, but not sure what it is.
The Airfilter livened the old girl up a bit, and I wiouldn't mind a bit more umph without spending ridiculous amounts.....
So the 42mm or 45 mm would be worth my while you think?

[Crasherfromwayback]

Yes, motor is still stock 88......
Just that there is a 45 for sale at the moment for a reasonable price on Trademe
If not I would indeed go for the 42mm .......
I have only put a K&N filter on mine, and the exhaust isn't standard, but not sure what it is.
The Airfilter livened the old girl up a bit, and I wiouldn't mind a bit more umph without spending ridiculous amounts.....
So the 42mm or 45 mm would be worth my while you think?

Boring your stock carb is a good mod for the $'s too. We do that at WMCC for you. CV carbs work well for most street applications.

[bsasuper]

I dont understand why HD owners want to get more HP. If HD cant get a decent amount of power from 96 cubes, or rev tec etc etc, then just give the motor development back to AMF motorcycles (aka kawasaki) and they will sort it.

[BIG DOUG]

because they are the small bock chevy of the motorcycle world

[Headbanger]

I imported a Mikuni from the states, had it in my grubby paws for approx $300 NZD. Bought the setup without the mounting kit.

Bastard mechanic told me I was a cunt but he still installed it, it was like night and day. Bike really came to life.

[Hortz]

I put a 42mm mikuni for my 87 fatboy. Mikuni cabs do cough a bit until it warms up.... mm couldd just be mine (damm)

[MeHigh]

Dynojet the old CV carb for a stage 4 ( I have on my bike stage 7 but I wanna bore it to 95) ! Nothing less comparing with Mikuni 45 or S&S, except the $.

[MeHigh]

I put a 42mm mikuni for my 87 fatboy. Mikuni cabs do cough a bit until it warms up.... mm couldd just be mine (damm)
Had problems with Mikuni 45 as well... running rich, running lean twick the shit out of it for ages... changed it back to my ol carb, rejet it and good as gold - like Mikuni when was running perfect( i have a high flow filter and V&H on it)

Crasherfromwayback - what's with the boring the carb? Where , how $ and what's the deal?

[awayatc]

ordered new 42 mm for just over $400.
Wait and see now.
Screaming eagle airfilter made noticable difference.
so am hoping carby will be similar at least.....

[porky]

Dynojet the old CV carb for a stage 4 ( I have on my bike stage 7 but I wanna bore it to 95) ! Nothing less comparing with Mikuni 45 or S&S, except the $.

Whats stage 7 ?

[Paul in NZ]

Cheapest option is to keep your carb and change your engine... Nah - just kidding, Crasher and Doug are good cunts who know their shit...

[MeHigh]

Whats stage 7 ?
http://www.hdtalking.com/fuel_and_carb_related_issues/984-dyno_jet_kits_explained.html

[jim.cox]

Too big a carb will cause your bike to bog at lower revs

Sounds to me like the 42 would be a better choice

( or you could just get a Ducati :) )

[doc]

I am thinking of getting a Mikuni HSR 45 for my 88 TC Heritage...
According to the write ups it increases HP a fair bit....
if used with free flowing pipes 25% over stock is claimed.
Just wondering if anybody here has any experience with with any of the carb upgrade options...

You startin to do a "Burt". make sure you know when to stop making offerings to the "Gods of speed"

http://xlforum.net/vbportal/forums/showthread.php?t=38362

[awayatc]

Got my carby from good old US of A delivered to my frontdoor early this week......
Was away, so only installed it today.
Had to fart around a bit,
File some cylinder material away to make it all fit,
and had some backfiring issues, BUT
she is running nice now......
crisp response to throttle, no stuttering or any other failings
Not sure how much better she realy goes, will wait for gap in the weather and take it for a decent blast tomorow hopefully.......

AND got some solid wheels to go with revamp....
but that is another story.
am happy little sailor again......

[rok-the-boat]

I had a HD 1340 for over ten years.Put an S&S E on it and it became a more reliable starter - sod all to performance. Tried lots of different pipes over the time I had it and they were all gutless, until I tried the Thunderheader. If I ever get another HD, the first thing I will buy me is a Thunderheader. It felt like it released all the power it has in there. Standard pipes just restrict the thing, and drag pipes are just as useless. After I got the Thunderheader I needed a new clutch ... get one ... you won't be disappointed.

[admenk]

Got my carby from good old US of A delivered to my frontdoor early this week......
.....

As a matter of interest, who in the states did you buy it from?

[popelli]

I had a HD 1340 for over ten years.Put an S&S E on it and it became a more reliable starter - sod all to performance.

had my glide for 14 years now and had a S&S E on it, excellent carb, and I have more performance everywhere, for pipes I modified the standard glide headers into a 2 into 1 by cutting off and wleding over where the rear pipe splits, muffler is Bubs (straight through and minimal baffleing)

Re all this talk about 42 and 45mm carbs, for street use most of these carbs are too big, the gas velocity through them will be slower and they may not give the best result for street use

Had a 89" stroker shovel running a 40mm Mikuni, it would see off most evo's

running than same carb now on a panhead and its more than adecuate and the pan is putting out more power at the back wheel than the factory claimed for the standard evo's

my advice for carbs is either Mikuni or S&S depending upon which you can get the best deal on

one carb to avoid is the quicksilver / edelbrock abortion, they give great power if you ever get them running right but they will only ever do about 25mpg

[porky]

http://www.hdtalking.com/fuel_and_carb_related_issues/984-dyno_jet_kits_explained.html

ThanKs for that
I suppose saves drilling them yourself and stuffing it up :shit:

[awayatc]

As a matter of interest, who in the states did you buy it from?


http://stores.ebay.com.au/USMOTOMAN

By the way....
carb performs definitely better then my old CV, but it is not worldshattering.
It is noticably stronger at higher speeds...doesn't seem bothered going uphill/2 up etc.
Hesitates a bit from idle to first bit of throttle, but haven't tweeked carb yet, just bolted on as it come out of the box.

[BIG DOUG]

popelli wouldn't mind seeing a pic or two of your pan,I have a 51 which I will start building next year as soon as I finish my shovel.