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Jaguars' Motorized Bicycle Performance Parts |
 | 69cc Engine Kit* This updated kit has a balanced crank, a larger Speed V2 carburetor and a smaller rear sprocket for 10% more speed. Most of the other engine kits have unbalanced cranks that cause too much vibration. Click here to see examples of bicycles I can install the engine into. QUALITY is what you get with this from a professional installer with decades of 2 stroke experience. No, this kit isn't too powerful, the others are too weak. $350 local installation * also known as 80cc using an uncommon method of calculating displacement |
Motorized Bicycle Performance Parts
| Machined Heads for Higher Compression Standard compression on these engines is around 90psi which is too little and reduces power (which the factory wants so the engines can be allowed into more countries). Increasing to around 130psi helps greatly with more power. Above 130 is not recommended because it can cause the chrome cylinder plating to come off. All of the aftermarket heads available create too much compression. I sell standard heads that have had enough of their mating surface removed to increase the cranking pressure considerably. Local people need to let me work on their existing heads because I only order heads to fulfill mail orders. $20 labor, $30 for new head |  |
Motorized Bicycle Performance Parts
 | Jaguar CDI and High Voltage Coil The standard CDI is somewhat unreliable and causes the ignition timing to happen too early in each combustion cycle so that too much combustion pressure is created which causes loss of cylinder plating. The Jaguar CDI was created by me years ago when I was improving my ride when I lived in the mountains of Ecuador. It has correct timing for higher top speed and less vibration, and it increases spark strength for more consistent combustion. $10 labor, $70 cost |
Motorized Bicycle Performance Parts
| Lighter Wrist Pin The standard engine (not the ones I sell) vibrates too much due to the balance hole sizes in the crank wheels being too small to not properly counterbalance the weight of the piston assembly. By lessening the piston assembly weight you can lessen the vibration. The piston pins I sell are 30% lighter for less vibration. With this pin if you still have too much vibration then you need a balanced crank (see below). $20 each |  |
Motorized Bicycle Performance Parts
 | Balanced Crank Assembly The standard crank assembly needs a couple extra balance holes to give the correct balance for the engine. This reduces vibration and makes riding your bike a joy. The only real challenge is splitting the cases but with a few good tools it's not too hard. I will require your crank so I can drill the holes in it. Click here to go to my pages about crank balance. $50 labor |
| 55cc Engine Upgrade This is an upgrade from 48cc although you need to stay at 48cc to stay legal in many States. But really the cops don't take apart the engine to measure its dimensions to calculate its size. People that are heavy and people that climb a lot of hills are usually the ones interested in this upgrade because of the power increase it gives. This is for those who already own a 48cc engine. Also advised is to get the lighter wrist pin because the 55cc piston is heavier. 32mm stud spacing for intake, 40mm exhaust. $100 cost, $20 installation |  |
 | Intake Adaptors To use a quality carburetor such as Mikuni or Dellorto may require an adaptor. I have various sizes available. If you are serious about having the best power and running clean then a different carburetor other than the ultra cheap ones that come with most kits is essential. Click here to read more. adaptors $7, manifolds $15 |
