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CZ 250 discussion forum:1978 CZ 305 |
| 1978 CZ 305 |
| Andy said 2004-06-14 02:18 |
| I owned a 1978 CZ305 which is basically a CZ250 running 350cc pistons and 26 millimetre carb plus jets. Compared to the CZ250 it as considerably quicker with a top speed of 90 MPH though still had the classic JAWA/CZ fault of the speedo always reading 3 to 4 MPH less than actual speed. The general difference I noticed over the stock CZ 250 was the increase in engine torque with the CZ 305 model. Hills that normally defeated the 28.5 Ft/Lbs. torque, forcing a change down to third didn´t need it with the CZ 305 bike. Also head winds were not so much of a problem. Also the famous "nipping up" problem if a CZ 250 Sport was held at the maximum speed of 85 MPH (or over 75 MPH) for more than 3 miles, didn´t affect the CZ 305 Sport. When I bought it second hand back in 1990 I ran it home down the dual carriage way at 90 MPH (flat out), still sat upright, for 5 miles and it was quite happy to do that. At 291 Lbs. dry and a low centre of gravity, all CZ twins do handle in ways that only LC/RD/X7/GT/KH owners can only dream of (I´ve owned or ridden the competition!!) as anyone who ever ridden any CZ will tell you. 100% perfect handling second to none!! Don´t know if any Aprillia built licence versions were done in 305cc as I´ve only seen Aprillia built CZ 250 (two 1974 models owned by a friend) and an Aprillia built CZ 350 (mines a 1979 model). As far as I know the CZ 305 Sport was soley a Czech machine. Like the Suzuki Rebel T305, it´s slight ly better than the 250cc version but not as good as the 350 version which has twice the horse power than the 250cc version. Engine went for 35,000 miles beforethe wear in the final drive bearing (the JAWA twin´s favourite major fault!!) killed the top gear selector. Another problem with mine was that sometime in its life some moron had used 20/50 gear oil instead of two stroke thus putting graphite and soot into the main journal bearings (ceratin death to any two stroke) causing the slight whine from the engine to gradually turn into a rumble. Up until I took it off the road when it lost top gear it was great for traffic and hacking around in town being both light and agile whilst being still fast enough to use on motorways, which are usually certain death to 50cc bikes. Andy. |
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