How much does it cost to rebuild a bottom end?
So how much does a full rebuild cost you when you do it in your own garage? When you are using OEM parts, which includes all new bearings throughout the engine, a cylinder head, new valvetrain, new crank, new piston, new cam chain and tensioner, and a freshly honed cylinder, the cost comes to $1300 to $1500.
How much is a YZ85 worth?
Values
| Suggested List Price | Average Retail | |
|---|---|---|
| Base Price | $4,599 | $4,060 |
| Options (Add) | ||
| Total Price | $4,599 | $4,060 |
Is a YZ85 a 6 speed?
The Yamaha YZ85 is a motorcycle designed specifically for off-road and Motorcross racing. It is powered by an 84.7 cc single-cylinder, water-cooled, two-stroke, reed valve inducted engine and uses a 6-speed, constant-mesh, manual gearbox; with a multi-plate, wet-clutch.
How often should you do a bottom end rebuild?
The bottom end on a four-stroke engine can typically see 100 hours of life, however, to be on the safe side, most riders will rebuild it at approximately the 80-hour mark or sooner. Again, when you’re rebuilding the bottom end, always rebuild the top end and throw in a new piston at the same time.
What causes bottom end failure?
Bottom end failure is likely to be caused by lack of oil, or poor quality oil. The bearings are just shells with an interference fit, so they depend heavily on oil. They are not needle roller or ball bearings which are more tolerant of lack of lubrication.
How much HP does a 2020 YZ85 have?
It beats out its Japanese competitors, the KX85 and RM85, by producing 23.49 horsepower and 10.61 pounds of torque—both of which are smaller numbers than the previous YZ85 engine; however, Yamaha’s engineers knew that with the limited budget they had they weren’t going to match the KTM 85’s 25 horses and they were …
How do you know if you need a bottom end rebuild?
Simply grab the con rod and push and pull it while feeling for any movement. There will always be a small amount of side to side play, but there should be no up and down play whatsoever. If there is play, then the crank will need replacing, which means a full rebuild is needed.
How often should you rebuild a 2-stroke dirt bike bottom end?
It’s also important to keep in mind that if you’re running your two-stroke on the lean side, it may need more frequent rebuild intervals. As a general rule, and especially if you’re racing, rebuilding the top end – which includes piston and rings – every 25 hours would keep you in the safe range.
What happens when the bottom end goes?
Can you change a YZ85 small wheel to a Big Wheel?
Convert your existing 2019 YZ85 into a Big Wheel 85cc (Non-Competition) or Super Mini, starting with the necessary OE parts. The four easily installed OE components are the first steps towards getting your YZ85 ready to accept a 19×1. 60 front wheel and 16×1. 85 rear wheel of your choice.
What size rims are on a YZ85?
Enhance your purchase
| Size | 1.6*19/1.85*16 |
|---|---|
| Wheel Size | 16 Inches |
| Material | Aluminum |
| Bolt Pattern (Pitch Circle Diameter) | 50.24 Inches |
| Rim Size | 16 Inches |