I bought this big bore kit about 2 weeks ago n still haven't received it yet. Can u plz let me kno whats the hold up or do i need to buy another one. I received all my other orders except this one.
Big Bore Kit
Big Bore Stroker Kit
Top End Kit With Cylinder - 4-Stroke
Athena 290cc Big Bore Kit
- 6 reviews
- 1 reviews
- 1 reviews
- 0 reviews
- 0 reviews
Purchased one of these kits after the previous owner hot siezed the piston to the cylinder. Install was cake, nothing different then a standard cylinder and piston, bottom end picked up a little bit for sure, I really recommend adding a few drops of oil to the piston rings and adding a little bit to the top of the piston after it’s in the cylinder to keep it from binding really hard during the install, getting the piston initially in the cylinder is difficult but afterwords it’s a clean install, I run engine Ice with a super cooler kit and I have zero issues with over heating. You will likely require a re-jet kit, a 269 with stage one cams a loudmouth intake and a fmf exhaust caused a very lean run in my bike to the point where starting and idling the bike was almost impossible. I recommend sigma six they’re very helpful. This is on a kx250f 2010
I just installed this Big Bore Kit with a set of Hot cams stage 2 on my RMZ250. Everything went on perfect with no issues. Starts and runs great only problem is I haven’t got to take it to the track yet.
Thanks you Motorsport for your great customer service.
Am vary happy with this product simple to install and definitely can tell the increase in torc on the bottom end! Do recommend sending in your computer to be reprogramd for full power gain!
I have never liked the gaskets that come with big bore kits but these actually come with oem style and fit gaskets. Theres no replacement for displacement!
Power difference is great and perfect. Excellent buy
At first I was skeptical buying this. But after reason all the positive reviews. I decided to buy this kit and a crank kit due to a engine seize I had with oem parts. I put the bike back together and it roared. Sounded meaner. After the break in period,it was hammer down with no issues at all at 15 hours in so far. Bike is running strong and great. I recommend this kit to every one who is looking for a big bore. Installation was a ease with no issue. Also have had zero over heating issues even when running in a Sugar sand feild with the Florida sun bearing down at 89 degrees out
Improves power where you need it without sacrificing anything. It;s no 450 but it does help narrow the playing field.
- Answered: 30
- Not Yet: 4
Question asked by Josh Rivenburg
Question:Q: Will this kit work with a +3mm hot rods stroker crank in my 2005 Honda trx 450r?Question asked 1 month 6 days ago
Question asked by Mikeyb
Question:Q: I have a 2005 yz450f looking to know if this will bolt up and work without further major modificationsQuestion asked 2 months 14 days ago
Question asked by DEEZER
Question:Q: I would be putting this kit on a DRZ400E (2001). Those bikes have a higher compression ratio than the stated ratio of this kit. Do I sacrifice performance because of this? ThanksQuestion asked 4 months 13 days ago
Question answered by PaulUser's contributor status: Top 1Question answered 4 months 13 days agoAnswer: A: You're right; the original compression ratio on the 2001 Suzuki DRZ400E is 12.2:1.
Cylinder Works and Vertex intentionally selected the lower 11.3:1 compression for smoother firing, and easier tuning.
Question asked by Colbyg99
Question:Q: So I’m gonna order this kit for my 2019 250xcf it says it fits. And adds +3mm of displacement so how many cc is that actually adding and will I have to add a new rod?Question asked Over 5 months ago
Question answered by robertUser's contributor status: Top 10Question answered Over 5 months agoAnswer: A: Its will add CC to the engine but Cylinder works does not list the additional amount added with the +3 of displacement. They will have a mathematical equation to find this but it is not offer to us. It does not require the use of an extended rod.
Question asked by Robbie86
Question:Q: 2004 Suzuki Rmz250, will this work with no case machining?Question asked Over 11 months ago
Question answered by ChoweUser's contributor status: Top 25Question answered Over 11 months agoAnswer: A: According to Cylinder works you would not need to get your case machined. It would be an install and play kit. If you have any questions give us a call at 1-888-676-8853.
Question asked by Roger7457
Question:Q: Hi I was curious what the Hot Rods #4259 was. I wasn't able to find it. I did find a 4059.Question asked Over 11 months ago
Question answered by IsaacUser's contributor status: Top 10Question answered Over 11 months agoAnswer: A: Hot Rods part #4259 is the Heavy Duty (+4mm stroker) makes 424cc with the stock piston. We do offer the item.
Question asked by joseph
Question:Q: I have a 2017 ssr sr250s will this work for that? and what else would i have to buy to compleat the project?Question asked 1 year ago
Question answered by BillyEXT3407User's contributor status: Top 25Question answered 1 year agoAnswer: A: The Cylinder Works Big Bore Kit will not fit your SR250S.
Question asked by Itshaboy
Question:Q: I have a 08 yz250f would I have to machine the cases for this kitQuestion asked 1 year 1 month ago
Question answered by IsaacUser's contributor status: Top 10Question answered 1 year 1 month agoAnswer: A: No you do not for your model.
Question asked by Brad3224
Question:Q: Will this 468cc kit bolt right up to my 09 yz450f without any other modifications?Question asked 1 year 2 months ago
Question answered by robertUser's contributor status: Top 10Question answered 1 year 2 months agoAnswer: A: This will be everything needed beside re-jetting or fuel programming on the bike.
Question asked by Mike
Question:Q: I have a 2017 crf250r would I need any other other upgrades to use this? Or would you recommend anything else to go along with this kit?Question asked 1 year 2 months ago
Question answered by Trevor GearheadUser's contributor status: Top 10Question answered 1 year 2 months agoAnswer: A: To achieve optimum performance, re-jet the carburetor but other than that yo should be good!