TTR225 cylinder and head on YTM 225dx

[Jrobbins]

My 225dx needs the top end rebuilt. I found a good TTR225 top end for a good price. Does anyone know if it will fit/work? If it does is it a performance upgrade? I also found a new cylinder and piston from niche industries (part number 1509) as a stock replacement. https://www.amazon.com/Niche-Industries-Tri-Moto-Cylinder-1983-1986/dp/B01LZL04TR. Has anyone heard of this company, I'm not finding many reviews on them. Or should I just bore and rebuild my current cylinder?
Thank you in advance,
Jake.

[YamaBoss]

Just bore you're cylinder. I wouldn't use one of those Chinese kits. http://www.partzilla.com/parts/detail/yamaha/YP-15A-11110-01-00.html

The TTR cylinder looks to have the same part Number.

[DailyGrind]

yes you can use the ttr stuff and yes it raises compression from 8.8:1 to 9.5:1 and that is a performance upgrade. xt225 topends will also work

[Jrobbins]

Thank you guys you are awesome.

[Toaster556]

Wiseco also sells a 10:1 kit for the YTM225 if you want to pony up the extra cash.

[muthey]

the niche cylinders are actually pretty good just rebuilt a grizzly 660 with one and I am very pleased with it, only down fall is they dont soften the sharp edges and you can cut yourself on them.

[El Camexican]

Parts crossover is typically as easy as copy pasting the Yamaha part numbers from a fiche side by side on a spreadsheet. When I rebuilt my YTM I would paste discontinued part numbers from the fiche into Google search and many times the part number would come up for a newer vehical, or I would be directed to a site that still had stock.