Issue 4: RC ENGINE BEARING REPLACEMENT Is your RC engine running unusually hot or noisy? Do the bearings feel gritty to the touch? Well get out your tools, because its time to replace your engine bearings. Most engines have a front and rear bearing. If you are unsure of the exact size replacement bearings that you need please check out our RC Engine Cross Reference Guide. Place your engine housing in an oven at 325°-350° for 5 to 10 minutes. When you remove it from the oven your old bearings should fall right out, if not heat the engine a little longer. For some excellent step by step instructions on rebuilding your engine please see: NitroMonkey.com. We also suggest you place your replacement bearings inside a ziploc bag and keep them in the freezer overnight. Then slip the bearings into the engine while it is still slightly warm and when the temperature equalizes the bearings will have a press fit. In our next issue of the Boca Bearings Tips & Advice Newsletter we will talk about the best way to

- Boca Bearing Product Highlight -

RC ENGINE BEARINGS - CHOOSE YOUR WEAPON! Now that you know how to change your engine bearings, its time to choose a replacement or upgrade set thats right for you. Boca Bearings maintains a huge stock of miniature, precision ball bearings and stocks just about every standard size. Each size can potentially come in hundreds of different shield/ball/retainer configurations and choosing the appropriate one can be a very daunting task. Sometimes it is best to ask yourself what issues you are trying to address. Do you need more speed? Is your engine leaking fuel? Is your nitro destroying your bearings? Below is a comparison chart of the different RC Engine bearing models that Boca Bearings carries. SERIES SPEED PRICE FEATURE SAMPLE PART # Econo Fast Standard Comparable to stock engine bearings ENK-007 Stainless Steel Fast Medium 440C Stainless Steel to resist corrosion ENK-007ST High Speed/High Heat Faster High Polymite retainer to allow for expansion of the balls ENK-007HP High Performance Faster High Special seal to eliminate fuel leakage ENK-007HP Ceramic Premium Fastest Highest Lighter, faster, harder, non-corrosive ENK-007C Ceramic Premium- High Performance Fastest Highest Plus a special seal to eliminate fuel leakage ENK-007C-HP

- Rewards -

REWARDS The Boca Bearing Company is always looking to have the most up to date and accurate information as we possibly can. We are more than happy to pay you an instant Reward if you are able to provide information regarding an RC Model, Fishing Reel, Bicycle Hub, Inline Skate or Skateboard that we are not currently listing. If you are the FIRST to provide us with accurate information we will send you your choice of a 10% Discount Coupon or a 4-oz. bottle of our Midas Touch Lubricant ($13.95 Value.)