If you’re shopping for pit bike engine bolts, you want sturdy, corrosion-resistant fasteners that fit most 50cc–125cc engines. This guide highlights five top options that balance strength, compatibility, and value. Best for DIY repairs and replacements, these bolts suit riders who want quick maintenance without specialized tools. Below is a quick summary to compare the picks at a glance.
Product Quick Reference
- PRO BAT 2pcs 8mm x 115mm Engine Mount Bolts – Fits most 50cc–125cc pit bikes. Includes nuts and wrench.
- PRO BAT 8mm x 115mm Engine Mount Bolts – Single bolts with wrench for quick swaps.
- YD-PS001 Pit Bike Frame Bolts Nuts Kit – High-tensile steel set for multiple frame points.
- GuuYebe 2 PCS M8 Pit Bike Top & Bottom Engine Mount Bolts – Grade 8.8, zinc-coated for corrosion protection.
- PRO BAT Engine Mount Frame Bolts 105mm/115mm – Dual-length set for versatility on pit bikes.
PRO BAT 2pcs 8mm x 115mm Engine Mount Bolts
This pair of 8mm engine mounting bolts is designed for most pit bikes from 50cc to 125cc and similar ATV/dirt bike platforms. The set includes 2 bolts, 2 nuts, and a small wrench. Bolt length is 115mm (4.5″), with an overall length of about 122mm (4.8″).
Best for: Riders needing a quick, ready-to-use replacement for front and rear engine mounts on common pit bike engines. The included nuts and wrench simplify on-bike swaps. Caution: verify fitment with your exact engine mount configuration to avoid misfit or loosening.
PRO BAT 8mm x 115mm Engine Mount Bolts
This product offers a single 8mm engine mounting bolt with a 115mm length and a wrench. It’s compatible with a wide range of 50cc–125cc pit bikes and related ATV/dirt quad bikes.
Best for: Quick spot repairs when you only need one bolt replacement at a time. Better for spare-part users who purchase multiple individual bolts as needed. Limitation: may require a matching counterpart (nut) not included in the single-bolt package.
YD-PS001 Pit Bike Frame Bolts Nuts Kit Set
This brand-new frame bolts kit uses high-tensile steel designed for many PIT PRO Trail Dirt Bikes. It’s lightweight and durable, with easy installation, making it a strong choice for frame bolt replacements across several pit bike models.
Best for: Riders performing full or partial frame bolt replacements and seeking all-around durability. Caution: confirm the kit’s bolt lengths and thread pitches match your specific frame points to prevent misfit.
GuuYebe 2 PCS M8 Pit Bike Top & Bottom Engine Mount Bolts
GuuYebe’s set includes 2 bolts and is designed to fit 50cc–140cc pit bike engines, offering Grade 8.8 carbon steel construction with zinc coating for corrosion resistance. The kit also references a replacement for OEM part 81101 and includes two mounting bolts with a 115mm length.
Best for: Riders needing heavy-duty, corrosion-protected bolts with strong material. Choose this if you want a robust solution that matches or enhances OEM specifications. Limitation: the description mentions compatibility with non-pit bike models, so verify cross-compatibility with your engine before purchase.
PRO BAT Engine Mount Frame Bolts 105mm/115mm Set
This set includes two engine mounting bolts with different lengths—105mm and 115mm—both 8mm thick. It’s designed for pit bikes from 50cc to 125cc, suitable for top and bottom mounts on various ATV/dirt quad configurations.
Best for: Versatile mounting needs where different engine mount positions require different bolt lengths. Caution: ensure correct length for your specific mounting points to avoid contact with engine or frame components.
Buying Guide
What matters most when choosing pit bike engine bolts?
- Thread size and length: Most bolts here are 8mm with lengths around 115mm, suitable for many 50cc–125cc engines. Check your engine’s mounting hole spacing and head height.
- Material and coating: Grade 8.8 steel and zinc coatings resist corrosion and provide strength for outdoor riding. If you ride in wet or muddy conditions, coating matters for longevity.
- Included hardware: Some sets include nuts and a wrench; others are individual bolts. Decide if you need a complete kit or spare bolts only.
- Compatibility: While marketed for many pit bikes, verify fit with your specific model and whether the kit matches the engine mount points (top, bottom, or both).
- Replacement strategy: For ongoing maintenance, consider a small parts kit with multiple bolts of varying lengths to cover common scenarios.
How to verify fit and install safely?
- Measure the current bolts’ length from under the head to the end of the thread to compare with new bolts.
- Ensure the bolt head type matches your existing tools (likely a standard hex head compatible with common wrenches).
- Check for proper thread engagement but avoid over-tightening, which can strip threads or distort the engine mount.
What scenarios justify a dedicated kit vs. individual bolts?
- A dedicated kit is ideal for frequent maintenance or upgrades, offering multiple bolts plus nuts and tools for quick swaps.
- Individual bolts are best when you know exactly which piece needs replacement or when you’re stocking a spare part drawer with minimal items.
Durability and long-term use considerations
- Choose bolts with corrosion-resistant coatings for outdoor use and exposure to rain or mud.
- High-tensile steel (Grade 8.8) generally performs well under vibration and torque stress common in pit bike riding.
- Inspect bolts regularly for signs of wear, rounding of the head, or thread damage, and replace as necessary to prevent mounting failures.
FAQ
- What length are typical pit bike engine bolts?
– Common lengths are 115mm, with some variants at 105mm or 115mm; always verify with your engine mount measurements. - Do these bolts fit all pit bike brands?
– They fit many 50cc–125cc engines, but cross-brand compatibility should be confirmed by measuring mounting hole spacing and thread pitch. - Should I use a kit or individual bolts?
– If you perform routine maintenance or want ready-to-use replacements, a kit is convenient; for targeted repairs, individual bolts may suffice. - Are these bolts stainless steel?
– Most listed options use carbon steel with zinc coating or similar finishes for corrosion resistance, not true stainless steel. - Can I reuse bolts after maintenance?
– Reuse is possible if bolts show no signs of damage, but inspect threads and heads; torque to the manufacturer’s specification to avoid over-stressing the joint. - What tools do I need to install these bolts?
– A standard wrench or socket driver appropriate for the bolt head size, plus maybe a small wrench included in some sets.