Harley Stage Kits from GRM Performance Melbourne

GRM Performance
formerly Ghostrider Motorcycles

Harley Davidson Stage 1 Kits

Harley Stage 1 Performance Upgrade Kit

Harley Stage 1 Performance Upgrade Harley Davidson Kit
Harley Davidson Stage One Upgrade Kit

With GRM Performance Centre Melbourne you can get more power out of your Harley. We offer Harley Stage 1 and Stage 2 motorcycle performance upgrade modifications that are tried and true methods of increasing power and engine efficiency.

Our trained mechanics have years of experience in getting the best performance from your Harley Davidson using only reputable and OEM parts.

Harley Stage 1 Options

Stage One Harley Davidson performance kit options listed below are for those that currently have a stock or mildly modified engine, if you already have these modifications, please see our Harley Stage 2 Upgrade Kit options that add onto the performance work already completed.

Working with GRM Performance Centre Melbourne is much easier than pulling out the Harley Davidson Catalogue or one of the myriad of performance parts catalogues that are out there. We can advise on what performance enhancements will give you the best results for your Harley.

Ghostriders Performance Centre Harley Davidson Stage 1 performance kit upgrades specifically suited to Harley Davidson consists of the following:

In our expereince, there is no better first upgrade you can make to your Harley than with a Harley Stage One kit which is entirely a add-on procedure to your current engine.

Yes, these upgrades can be installed individually but the true performance increase on your Harley Davidson will only come to being once all three of these components are completed.


With free air in take and exhaust out your Harley now has the settings to provide a more stable and effective fuel mixture.

Standard Harley Davidson carburetors and EFI's are not designed with the performance potential your engine now has. Your Harley Davidson carburetor or EFI will need to be corrected to compensate for how differently the engine now breathes. On a carbureted Harley Davidson this means re jetting to allow more air and fuel into the engine in a controlled and managed manner.

As part of your stage 1 kit, we install new carburetor jets designed specifically for your make and model of Harley engine, offering true performance fuel management and increased engine efficiency.

EFI (Electronic Fuel Injection) models are another story.

Fuel injected models use a pre-programmed mapped computer to instruct how much fuel is to be delivered.

Since you have changed the way the engine breathes, those instructions will not supply the proper stable fuel mixture or give you the best out of the performance potential your engine now has.

We recommend Power Commander or Power Vision systems which are the most reputable and proven on Harley Davidson. Both Power Commander or Power Vision System can be programmed or "re-mapped" to deliver the perfect fuel mix to air intake and exhaust ratio at any RPM or riding condition - but this can only be achieved by programming the unit on a Dyno Jet dyno machine designed to run your engine through every riding scenario and map the computer with the fuel mix instructions.

GRM Performance - formerly Ghostrider Motorcycles, are an approved Approved Dynojet Power Commander & Power Vision Tuning Centre.

Approved Dynojet Power Commander tuning centre
DynoJet Power vision tuning centre
Harley Stage 1 air intake pod
Harley performance air intake Melbourne
Harley Stage 1 Vance & Hines performance exhaust
Harley Davidson V&H performance exhaust (Vance & Hines)
Harley Davidson Free Breathing Exhaust

If air intake is half of the equation of increased airflow, air exhaust flow is the other half. If your engine can get all the air it can use, this needs to be expelled just as quickly & easily or your Harley Davidson engine will continue to struggle to run at it's peak performance.

As with the Free breathing air cleaners and intakes this upgrade can be simple or extreme.

Many choose to keep their stock pipes and go with slip-on mufflers. These are easy to install, maintains a stock look, and adds plenty of performance. Popular slip-on models include Harley Davidson Screamin’ Eagle II,Vance and Hines, Freedom, and Cobra to name a few. These brands also offer complete exhaust replacements that are specifically designed to give full unrestricted exhaust air flow, a custom look to your Harley Davidson and a sound that enhances the famous Harley rumble.

A free breathing exhaust for your Harley Davidson is a must have performance upgrade to achieve more performance and allow your engine to run unrestricted.


This is the simplest performance upgrade for your Harley Davidson. Depending on your budget this ranges from changing the air cleaner to a high air flow model to installing a new high air flow air intake full intake assembly such as K&N, Kuryakyn, Screaming Eagle, Performance Machine and more.

Each one offers different designs, looks & shapes for better air flow. You don’t have to spend a fortune but you should pick something that fits your bike well, blends into your overall theme and is of a quality brand.

If your plan is to keep the look of your current cover assembly go with Screamin’ Eagle or Arlen Ness “Big Sucker” assemblies. These allow you to use your stock cover but the difference over stock is amazing. Free breathing air cleaners and intakes allow more air into your engine for combustion giving the engine as much free air as it needs rather than being restricted as the stock air intakes are.

GRM Performance - formerly Ghostrider Motorcycles Performance Centre Melbourne is one of the very few fully authorized and certified Power Commander Dyno Tuning Centers, using the latest in Power Commander Dyno Tuning equipment installed in a sealed dyno room. GRM Performance - formerly Ghostriders, can, as part of your Harley Stage 1 performance enhancement program tune your engine so it runs at peak performance, no matter what EFI version of Harley Davidson you ride.

Approved Dynojet Power Commander tuning centre
Power vision tuning centre

Contact us

For motorcycle repairs, performance upgrades & motor bike service matched by none in Melbourne, you can trust the team at GRM Performance (formerly Ghostrider Motorcycles) in Hoppers Crossing. Whether your motorbike needs a tune, a service, an upgrade to increase performance, or comprehensive repairs – you can rest assured that your motorcycle is worked on by industry professionals with a passion for cycles. We promise we’ll treat your motor bike as if it were our own. Please contact us today for all your motorcycle accident repairs, motorcycle service and upgrade needs. And we can even supply Motorcycle Roadworthy Certificates.

We’re reachable by phone on (03) 9749 0884 or by email through office@grmperformance.com.au.


Unit 1 / 13 Motto Court,
Hoppers Crossing, VIC, 3029
Give us a call:
Telephone: (03) 9749 0884
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03 9749 0884