Well I am so sorry that I did not find these reviews before we purchased the bikes. I purchased the M2R Racing RF140 140cc 17/14 86cm Red Blue Dirt Bike (Date of purchase: 5/12/2018) and M2R RF160 S2 160cc 17/14 86cm Red Blue Dirt Bike 2018 (Date of purchase: 5/01/2018) from Funbikes. At the point of purchase I paid £809.00 and £1164.00 respectively (Total £1973). The bikes are not of satisfactory quality and within the first three months of use, between the two bikes we have had to replace a total of five inner tubes (not through punctures, but due to the valve stems blowing out as a result of poor quality/design). We know that we are not alone in encountering this particular problem as we know of two other individuals who have had this problem with ‘Funbikes’. On the 140cc which was ordered, we have had to replace two throttle cables only a matter of three weeks apart and the rear brakes have also failed (major safety issue). Further, the chain needs to be tensioned before every use as the chain keeps on stretching (despite the adjusters remaining fixed), again poor quality of materials used. The knock on effect of this means that the sprockets will wear out very quickly. It was suggested by a girl in their customer service department that this is usually down to lack of maintenance. I am appalled at this suggestion. Common sense would tell you that we haven’t had the bikes long enough for them to suffer from any lack of maintenance. In fact, it is an exception when they don’t require repairs and maintenance after each occasion of use. On the 160cc the throttle cable has also snapped but due to a combination of poor assembly/defective materials, it has proved impossible to remove the throttle assembly to replace it. We have also had to replace a split fuel pipe within eight weeks. It is obvious once again that this is due to poor quality materials. Overall, it is patently obvious when so many faults have arisen with not just one, but both bikes in only three months from new, that these bikes are unfit for the purpose for which they were bought. Needless to say we have logged a complaint with Trading Standards as the company are outright refusing to refund. AVOID LIKE THE PLAGUE!!!!!