Finding durable engine mounts is essential for pit bikes, quad bikes, and ATVs powered by 50cc to 150cc engines. This guide highlights top engine mount bolts and kits designed to fit a wide range of pit bikes, including 50cc, 70cc, 90cc, 110cc, 125cc, and 140cc models. Each option prioritizes strength, correct thread pitch, and precise length to ensure secure engine mounting. The following selections are organized for quick comparison, with direct links to reliable Amazon listings for easy access and checkout.
| Product | Brand | Key Feature |
|---|---|---|
| PRO BAT 2pcs 8mm x 115mm | PRO BAT | 2 bolts with nuts and wrench included |
| 8mm Engine Mounting Bolts Nuts Spanner Kit | YD-PS001 | L=115mm, 1.25mm pitch, fits 50cc–250cc |
| PRO BAT 8mm x 115mm Pit Bike Bolts | PRO BAT | Top & bottom set, 1 wrench included |
| DJ-Motor M8x105mm / M8x110mm Set | Generic | Flange bolts, multiple lengths |
| TC-Motor Engine Mount Bolt Set | TC-Motor | 105mm & 110mm options for pit bikes |
PRO BAT 2pcs 8mm x 115mm Engine Mount Bolts
This set includes two 8mm engine mounting bolts suitable for most pit bike engines ranging from 50cc to 125cc. The package also includes two nuts and one wrench, providing a convenient, ready-to-install solution for top and bottom mounting needs. Bolt length is 115mm (4.5 inches) with a total length of 122mm (4.8 inches), designed to align with common engine mounting points on pit bikes and ATVs. The kit supports versatile compatibility across several 50cc–125cc platforms.
8mm Engine Mounting Bolts Nuts Spanner Kit
This kit features an 8mm engine mount bolt with an 115mm length (not including the bolt head) and a 1.25mm thread pitch. It is designed to fit nearly every pit dirt bike engine from 50cc to 250cc, making it a flexible choice for builders and maintenance. The kit’s standardized dimensions help ensure a reliable fit across multiple models, reducing downtime when swapping engines or repairing mounts. A practical option for riders seeking a single, multipurpose bolt solution.
PRO BAT 8mm x 115mm Top & Bottom Engine Mount Bolts
This PRO BAT offering includes one bolt and a wrench per set, with a bolt length of 115mm and total length of 122mm. The product is designed to fit pit bike engines from 50cc to 125cc, including Pit Pro ATV dirt quad applications. Its compact packaging makes it easy to store as an extra, ensuring you’re prepared for on-the-go field repairs or upgrades without sacrificing mounting integrity.
DJ-Motor M8x105mm / M8x110mm Engine Mount Bolts Set
DJ-Motor offers a flange bolt set with silver finish in two standard sizes: M8x105mm and M8x110mm. This set targets pit dirt bike motors and provides reliable fasteners for secure engine mounting. The flange design helps distribute load and reduce loosening under vibration, making it suitable for riders who frequently ride on uneven terrain or subject their bikes to dynamic engine movement during jumps and throttling.
TC-Motor Engine Mount Bolt Set 105mm & 110mm
TC-Motor provides a bolt set with 105mm and 110mm options, designed for pit dirt bike motors. The product description emphasizes careful selection to ensure correct fitment, with customer service ready to assist before or after purchase. These bolts target reliable engine mounting for a range of pit bikes, focusing on precise dimensions and compatibility with common engine mounting systems used in 50cc–125cc platforms.
Engine Mount Frame Bolts M8 X 105mm & M8 X 115mm Kit
This kit includes two bolts: one 115mm and one 105mm, both 8mm thick, designed for quad pit bikes and dirt bikes underneath the engine frame. The set claims compatibility with popular quad brands such as Lifan, Zongshen, YX, and similar pit bike builders. The mix of lengths provides flexibility for varying frame designs and engine mounting geometries.
Buying Guide: What to Consider When Choosing Pit Bike Engine Mounts
- Length and diameter: Confirm the bolt length and 8mm diameter align with your engine and frame mounting holes to avoid misalignment or stripped threads.
- Thread pitch: Most pit bike bolts use standard metric pitches (commonly 1.25mm). Mismatched pitches can cause cross-threading and failure under load.
- Head type and flange: Flange bolts distribute load better and reduce loosening. Ensure the head type fits your mounting tab and doesn’t collide with nearby components.
- Included hardware: Some kits include nuts and wrenches, offering convenience for on-site maintenance. Check if you need extra nuts or tools.
- Material and finish: Chrome or zinc finishes resist corrosion from moisture, mud, and salts encountered in off-road riding.
- Model compatibility: While many bolts fit a broad range of engines (50cc–125cc), verify fitment against your exact model and year to avoid fit issues.
- Ease of installation: Some kits are designed for a direct bolt-on swap with no drilling, while others may require minor adaptations.
- Support and return policy: When buying generic or third-party bolts, consider seller support and return options if the fit isn’t right.
In summary, select a kit that offers the correct length, thread pitch, and mounting compatibility for your pit bike or quad. For frequent riders, kits with included tools and nuts provide added value and faster field maintenance. If your bike uses unique frame geometry, consider a set with multiple lengths to ensure a secure, even load distribution across both top and bottom mounts.