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Need a little more power for my Servicar(and how to do)

Moderators: Curt!, Pa


Posts: 10
Hello ,

I am from The Netherlands (europe) and I have a 49 Servicar.

I already changed the carb for a Mikuni and the ignition for a magneto.

The Servicar isn't riding faster than 80 Km/h.

I need a little more speed.

What is the best I can do(best for the buck)?

I have tought to remove 2 mm from the heads (Aluminum type5) so I have a little more compression and bore the cylinders .060 over so I have a little more CUI.

Will this be enough to ride 100 Km/h?

What else can I do and how?(maybe biggervalves, porting and polising in and outlet?)

Can you give me some suplliers fot the pistons and stuff?

Thanks in advance.

Image

Post Fri Jan 13, 2006 4:55 pm

Posts: 10
Thanks for the answer.

I really dont know wich cams and gearing are in it, I thinks they are factory ones, also the manifold.


The reason that I replaced the ignition with a magnetos was that the original was dead and they sad it would better with a magneto.

It is a 32 MM mik carburator.

The performance I only need for cruisin no for a giant pull off.

So a better set of pistons may help... also bigget valves??where can I buy them?

Post Fri Jan 13, 2006 7:20 pm
Pa Site Admin

Posts: 5671
Location: Ohio USA

Ditto on what DC said. I would also suggest starting with Kurt at 45" Parts Depot after you find out just what you are running right now. He is in the Netherlands at...
http://www.45partsdepot.com/45parts/indexexp.html
Kurt has quite a bit of performance parts for the 45" and he will take the time to chat with you about the upgrade. He also stocks the diaphram clutch conversion. This clutch should make up for the weaker stock clutch when it comes to higher gear ratios and more horsepower. Real nice trike you got there too ! Pa

Post Sat Jan 14, 2006 11:51 am

Posts: 148
Location: Dorothy, NJ. USA

Great lookin scoot. It takes horsepower to turn and push those wide tires thru the wind. Even tho they look great get a set of narrower wheels and tires, mags, spokes(my preference), even steel discs. 5.00 or 6.50x16s. See how much faster you can go. It really makes a difference, Honest. Keep the wide ones for shows tho, they look great.

Post Sat Jan 14, 2006 6:48 pm

Posts: 188
Location: howell mi usa
Great looking trike, and nice wheels. But I have to agree with HJ on the wheels. 100 lbs of rotating weight is equal to putting 1000 lbs in your trunk

Post Sat Jan 14, 2006 9:30 pm

Posts: 148
Location: Dorothy, NJ. USA

compareing holding a 2x4 out the window at 50mph vs a sheet of plywood, bit of wind drag too. rolling resistance,makes it more difficult to turn a corner if they are sticky compound.

Post Sun Jan 15, 2006 8:21 am

Posts: 188
Location: howell mi usa
DC are you saying these wheels aren't slowing this down. I can see the advantage on the freeway keeping up with traffic at 70+ mph, but you have to get there first. As a matter of fact I probably was sleeping or doing something I shouldn't have been in physics. But I have been building 9 sec. street cars for the last 20+years. When your driving from light to light in town, lighter is better.
And then you have to stop those big flywheels, but we're not there yet.
Activate, don't get me wrong the wheels look great, and there are things you can do to get more out of this trike to make up for the rotating mass, but more power to the wheels will definately need a better than stock clutch.

Post Sun Jan 15, 2006 1:47 pm

Posts: 104
Location: VOLUNTEER STATE
DUMB CLUTCH,you're right;youdon't know the first thing about drag coefficients.Bigger/wider tires take more horsepower to turn and keep turning;ask anyone that owns a 4X4. stroker

Post Sun Jan 15, 2006 7:54 pm

Posts: 188
Location: howell mi usa
I definitely agree this set up should handle way better than stock, and wind resistance is not a factor here, and maybe the stock clutch would be enough. But the rotating mass 10X factor is a fact, be it wheels, tires, driveshaft, axles. I know this trike doesn't have a driveshaft, at least, I don't think it does.

Post Sun Jan 15, 2006 10:19 pm
panic

"the rotating mass 10X factor is a fact, be it wheels, tires, driveshaft, axles"

Absolutely no basis in fact.
Cite your source.

Post Mon Jan 16, 2006 10:20 am

Posts: 304
Location: Jonesville, Louisiana, USA
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Last edited by dalaymond on Mon Jan 16, 2006 10:25 am, edited 1 time in total.

Post Mon Jan 16, 2006 10:22 am

Posts: 304
Location: Jonesville, Louisiana, USA
Great looking trike !!

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