Upstart Battery YT4B-BS 12V 2.3Ah Battery for Yamaha TTR110 — Sealed AGM, Pre-activated

Upstart Battery YT4B-BS is a sealed 12V 2.3Ah AGM replacement battery that drops into Yamaha TTR110 series bikes for reliable, maintenance-free starting.

If your TT-R110, TTR90E, or TTR50E needs a compact, OEM-dimension battery replacement, this Upstart Battery meets the YT4B-BS specification and arrives factory-activated so you can install and ride immediately. It’s engineered to match the exact footprint and terminal layout of the original cell, offering sealed AGM construction, spill-free operation, and a lightweight package that fits cramped dirt bike battery boxes.

Will this battery fit my Yamaha TTR110 or similar small TT-R models?

Yes — the Upstart YT4B-BS is built to the same physical and terminal specifications as the OEM YT4B-BS. That means it installs without modification into the stock tray and lines up with factory cable routing.

• Exact footprint: 4.52 x 3.44 x 1.52 inches to match the OEM bay.
• Same terminal layout for bolt-on connections.
• Compatible models: TTR110E, TTR90E, TTR50E and other YT4B-BS applications.

How do I install and prepare the battery for use?

Installation is straightforward because the cell ships pre-filled and sealed from the factory — no acid packs, no filling, no waiting. Simply remove the old battery, position the Upstart YT4B-BS in the tray, secure the hold-down, connect the terminals, and test the starter.

• Factory-activated sealed AGM: zero activation steps required.
• Bolt-in fit: no trimming or adapters needed.
• Ready to crank: designed for immediate first-start performance.

What kind of starting performance and maintenance can I expect?

This 12V battery delivers dependable cranking with a 20 CCA rating in a sealed AGM configuration, giving predictable starts after storage or during cold mornings. Because it’s maintenance-free and spill-proof, you won’t need to check electrolyte levels or worry about leaks after a tip-over.

• 20 cold-cranking amps suitable for small-displacement dirt bikes.
• AGM construction prevents spills and eliminates routine watering.
• Lightweight at about 1.87 lbs, reducing added weight on the bike.

How durable and safe is the battery for trail use?

The sealed absorbed glass mat design resists vibration and contains electrolyte inside the separator, which limits corrosion risk and improves durability on off-road trails. Its compact, rugged case is designed to handle the confined, bumpy environments common to mini and youth dirt bikes.

• Sealed case for spill-free operation if the bike tips over.
• AGM inner construction tolerates vibration better than loose-electrolyte cells.
• Compact form factor built to OEM dimensions for secure mounting.

Who is this for? Riders, parents, and mechanics who need a hassle-free, OEM-dimension replacement for Yamaha TTR110-series bikes will appreciate the Upstart YT4B-BS. It’s ideal for weekend trail riders, youth-bike owners, and anyone keeping a small-displacement dirt bike ready to start after storage without the mess of conventional wet batteries. If you want a lightweight, factory-activated, maintenance-free battery that fits the stock tray and restores reliable starting performance, this model is a straightforward swap that gets you back on the trail quickly.